Now that you know it’s not a ground wire you can apply the correct voltage to turn on the amp. You pull out the old head unit and you’re faced with a nasty patch work of wiring from previous botched installs. When you apply 12V to the wire, the antenna will go up. Reconnect the … While they can look like some sort of multicolor pasta dish, wiring harnesses help you connect your new car stereo to your vehicle's wiring. But before you start touching that wire to a voltage source, it’s a good idea to just verify that the wire you are testing is not a ground wire of any kind. This move is always important because it protects you from being electrocuted. This wire will be at 12V at all times so you will test it with the ignition in the off position. In order to get any speaker response from the wires in the dash, you will need to identify and apply power to the amplifier turn on wire which I’ll address in the next section. View mobileinstallguide’s profile on Facebook, Top 10 Must-Have Car Electronics Install Tools, What is the Big 3 Upgrade – And How to Install it, Multimeter Uses and Functions – How to Use a Digital Multimeter. When you remove voltage from the wire, the antenna will go down. It may seem silly, but the worst time to find out about a wiring issue is after you have re-installed all of those trim panels! In this post, I’m going to teach you how to rewire a car stereo from scratch, clean up that wiring mess, and get it looking back to normal. This can get pretty tedious. Attach the black meter probe to ground. To wire a car stereo, start by disconnecting your car battery to avoid electrocuting yourself. There are a few basic tools you will need to get the job done right. Ironically, most of the tools you need also show up on my list of Top 10 Must-Have Car Electronics Install Tools…go figure. This is because the speaker wires in your dash do not go directly to the speakers, instead they are the input signal wires for the factory amplifier. Now that you’ve identified which channel you will connect these wires to, you need to determine which wire is positive and which one is negative. Tagged: harness, rewire, stereo. Then using the measurements, purchase a new aftermarket car stereo. In order to get any signal from these wires to translate to the speakers, the factory amplifier needs to be powered on. How do I rewire a cut harness for the car radio of a Chrysler Town and Country 2010? If you have the correct wire, you meter readout should jump to between 11.5V and 12.6V. Connect the constant wire to the yellow wire of the stereo harness. If you ever want to (or need to) replace the radio in the car again, you won’t have to keep cutting the factory wires farther and farther back to put a new harness on. How do I rewire a cut harness car radio of a chrysler town country 2010 The originals 2harness were cut, I bougth - Chrysler Cars & Trucks question Wrap shrink tubing along the connected leads, and apply hot air from a blow dryer or similar heat gun to contract the tubing along the wire. To test these wires you will need your digital multimeter set to Volts DC (VDC). I like to use. If your speakers do not pop or move in any way when you touch the wires to the 9V battery, you may have a factory amplified system. Touch the red meter probe to the wire you are testing with the ignition in the accessory position. Most vehicles use a 12V signal for the amp turn on so you could just touch the wire to the constant 12V wire. Matthew Wright, author. This graphic (2003 Buick Century Radio Wiring Diagram Beautiful How to Rewire A Cut Harness Car Stereo) above is actually branded together with: 2003 buick, published by admin with 2018-03-27 19:40:06. Since this is a special case, I won’t go into detail in this article, but I’d be happy to answer any questions in the comments or via email (scott@mobileinstallguide.com). Step 3: Attach the new wires connections, use tools for this. If your vehicle does have a factory amplifier, then you probably noticed that nothing happened when you tried to follow the steps above for identifying the speaker wires. Illumination/Dimmer wire. Hopefully after reading this, you are now ready to take on the job of installing your new radio even though the factory harness has been cut. You will connect this wire to the yellow wire on the stereo harness. You could just connect your radio harness directly to the vehicle wires, but I would strongly suggest using a reverse harness. It is important that you are able to install the car radio wire harness in a way that will allow you to be able to use it easily later down the road. This wire will connect to the red wire on the stereo harness. you will need to power up the factory amp turn on wire with a 12 volt signal to pop the speakers in the verification process . The stock speaker wiring uses 'common ground', and I've been advised to (somehow) un-do this by rewiring the speakers. The ground wire connects to the black wire on the stereo harness. Below is a list of the aftermarket wire colors and their function. To test these wires you will need your digital multimeter set to resistance or Ohms. A car radio wire harness is something that you will find can be difficult to use depending on how it is installed. You could just connect your radio harness directly to the vehicle wires, but I would strongly suggest using a reverse harness. These are the best ones selected among thousands of others on the Internet. Step 1: Cut the power. Attach the red meter probe to the constant power wire. November 24th, 2017 Posted in rewire. This wire will connect to the blue wire on radio harness. 0 # mpn4693264767. Another advantage is that if you ever want to sell the vehicle but keep the radio you put in, you now have a plug that you can use to install the factory radio back in. Touch the black meter probe to the wire you are testing for ground. Then you can purchase the forward harness that plugs into the reverse harness. Most vehicles use a 12V signal for the amp turn on so you could just touch the wire to the constant 12V wire. And you should do it no matter you are installing a subwoofer or an amp to your car. Now just repeat these steps for the remaining speakers and make the connections as you go remembering that on your radio harness; white is front left, grey is front right, green is back left, and purple is back right. The accessory power wire is at 0V with the ignition in the off position and switches to 12V in the accessory position. You’ll want to start off by removing the wiring harness from the old head unit. by Scott McIntosh | Mar 4, 2018 | Install Guides | 3 comments. All vehicle manufacturers use a different color code for their wiring so there is no universal color code I can give you for every vehicle. Before I start testing for polarity, I like to verify that the wires I’m testing are, in fact, speaker wires. Car Audio. I’d be happy to help you figure out how to handle these situations. Posted in rewire. What do you do?! Step 2: The first step is to remove the old car stereo, remove the wiring harness, you can use Din tools for this. The factory amp turn on wire does just that, it turns on the factory amplifier. Instead, they get a voltage signal from the head unit to turn on either the factory amplifier or power antenna. Step 8 Reconnect the electrical connector to the stereo, and reinstall the stereo within the dash with its fasteners and trim panels. Since every car is different when it comes to taking the dash apart I’ll skip the tools you’ll need to do that, but below is a list of the tools you will need to get the wiring job done right. Test the car stereo before you install it. If you have the correct wire you should have a lot more radio stations come in clear. If your car requires an output converter, connect this as well so your radio will work with your car. Next, attach connectors and connect with speakers. Secure all the wires by properly wrapping them. Many Ford vehicles, for instance, use a 6V signal for the amp turn on. Your email address will not be published. To do this you will use your digital multimeter to test the resistance between the two wires. Remove wires connecting with the power and speakers. Your email address will not be published. Just leave a question in the comments or email me at. With a two year warranty on Bose speaker amp repairs. Make sure you cut all the factory wires to the same length so your final result will have a clean look. If there is anything you think I should add to this post or if you would like to ask me any specific questions about your vehicle, leave me a message in the comment section below. With all the wire connections made, it’s now time to clean it up to protect the wires and avoid vibration noise. The meter should read 0V if it is not a ground wire. $16.33. We can start with wiring your radio harness with very comfortable phases. Comments Off. Make sure that the battery is disconnected by cutting the negative wire. Hi guys, I have a 1987 Subaru XT with 4 speakers and I'm installing a new head unit and speakers. - Chrysler 2010 Town and Country question To have access to the speaker wires is required to remove car stereo and door panels. I ran across this scenario countless times while working in the install bay and while it might be annoying, it’s not the end of the world. To test these wires you will need your digital multimeter set to resistance or Ohms. Step 4 Now apply 12V to the wire you are testing (you can just temporarily connect it to the blue wire off your stereo) and run the test again. Purchase the aftermarket wire harness! Axxess® Plug'n'Play Supplemental Harness. how-to-rewire-car-stereo 2/2 Downloaded from www.horecaplank.nl on December 12, 2020 by guest how to rewire a cut harness car stereo - YouTube Run each length of speaker wire to the location designated for each Specializing in repair of all Factory installed car audio sound systems including, Bose car stereo and speaker amplifiers. Now, I know it would be tempting to just start matching up wire colors and get the harness connected but it is always a good idea to verify all the wires before making your connections. Remove disconnected wires from the car and run new ones to the same places. I will see if I can’t find some good replacement ones before I wire up my next stereo. Touch the red meter probe to the wire you are testing. Now that you know it’s not a ground wire you can apply the correct voltage to turn on the amp. Mates the aftermarket stereo with car wiring harness Allow seamless integration of custom stereo with vehicle. It will connect to the blue with white stripe wire on your radio harness. You will also need your speaker tester or 9V battery. Touch the black meter probe to the wire you are testing for ground. Step 1 - Purchase the Radio. Q. First thing you need to do is measure your current stereo and the space it fits into. Special note . The most detailed guides for How To Rewire Headphone Jack are provided in this page. This creates a constant battery connection between your car and the stereo. Step by step installation instructions complete with photos, tool list, and wiring detail. Once the factory amp is powered on, you should be able to return to the steps for testing speaker wires. Your meter should read between 11.5V and 12.6V. Some examples of factory premium audio systems are BOSE, Harman Kardon, Infinity, and Rockford Fosgate. This wire will rest at 0V when your headlight switch is in the off position and go to 12V with the headlight switch in the parking lights or on position. Steps for wiring car stereo: Procedure: Step 1: Disconnect the battery. These wires are a little more difficult to test since they don’t get a voltage signal from the vehicle that you can measure. Your meter should read 0V if it is not a ground wire. ... stereo wiring harness, stereo wire harness, car audio basics, stereo removal, radio removal, speaker wire colors. Each speaker will have a positive and a negative wire. To see all images within New 2003 Buick Century Radio Wiring Diagram Pics images gallery remember to follow this web page link. Diy Bri gives you in-depth instructions and tips to successfully wire a radio into any vehicle without a wiring harness adapter. harness, rewire, stereo. I like to secure the tape at the ends with zip ties for good measure, but this is optional. How To Rewire A Cut Harness Car Stereo. To do this, just follow that same steps given above for testing the radio ground wire. Accessory power. It is a larger diameter tube that slips on over your soldered connection, once in position, hold the soldering iron to it to heat it up and the tube will shrink tightly over the connection to insulate it. I’ll go through each wire one by one and describe the testing procedure you will need to follow in order to verify each one. A reverse harness is basically a harness with a plug that is an exact replica of the plug that was in the vehicle originally. In a case like this, you will need to use a voltage divider between your aftermarket head unit’s amp turn on output and the vehicle’s input wire. I’ve seen resources give the wrong information before so it’s just a good habit to get into. Now that you’ve identified all the wires you can start making your connections. You may run into trouble identifying amplifier input signal wires on vehicles that have less common configurations such as common ground or digital signal. If you are unsure if your vehicle has a factory amplified system, one good indicator is if it is marked anywhere with a premium audio badge, then it will likely have a factory amplifier. Please keep in mind that not all factory amplified systems are created equal. Attach the red meter probe to one wire and the black probe to the other. The wire harness in my car was cut, can you tell me how to figure out the car stereo wire diagram to install my aftermarket or factory car stereo? If you know that your vehicle doesn’t have either of these two components, you can skip the steps that don’t apply. First, the essential thing is removing the key from the ignition or disconnects the battery before continuing. This makes the installation easier, does away with improper speaker phasing and can save a headache. If you have the correct wire, your meter should show the voltage go to zero. Notify me of follow-up comments by email. How To Rewire A Cut Harness Car Stereo Posted on March 31, 2018 by . You may need to get a wiring harness as well. The speaker cone will move out first, then back in if the positive wire is on the positive battery terminal and the negative wire is on the negative battery terminal. We discourage cutting the wire harness. Enjoyed reading through this, very good stuff, regards. Solder a wire to every pin identified by the pinout diagram. In order to power on the factory amplifier, you will need to apply the correct voltage to the amp turn on wire. Each wiring harness we sell serves a purpose such as installing an aftermarket car stereo, integrating an aftermarket amplifier with your factory car stereo, connecting Bluetooth to your factory car stereo… Do this enough times and the factory wires will be so short, you’ll have a hard time working with them anymore. Amplified antennas, however, are a bit more tricky. This wire will connect to the red wire on the stereo harness.eval(ez_write_tag([[468,60],'mobileinstallguide_com-banner-1','ezslot_10',121,'0','0'])); Since we have already identified the constant power wire, we will use it to verify the ground wire. for vehicles with an external amplifier like jbl bose moonsoon etc. Required fields are marked *. It will move in the opposite direction if the wires are reversed. How to Rewire a Car: Wiring Upgrade for Project ZedSled, Car Craft’s 1978 Camaro ZedSled Gets a Wiring-Harness Upgrade (Optional): This helps with wire management, make your wire harness look neater, and helps prevent the wire harness from rattling in the dash. I like to use the12volt.com to get factory wiring information. Then plug the stereo itself in for a test run. Once you got an overview about the function of the wires, now it’s time to start with how to wire a car stereo without a harness in a secure way. The illumination wire will connect to the orange wire on your radio harness, however, not all radios have this wire. The accessory power wire is at 0V with the ignition in the off position and switches to 12V in the accessory position. Universal Plug'n'Play Supplemental Harness by Axxess®. I'm not really planning to rewire the entire system and want to … Attach the red meter probe to the constant power wire. Free car stereo and car radio installation resource. Not all vehicles have a power antenna or a factory amplifier or both. The stereo I purchased came with a wire harness as well and I was wondering if I have to completely rewire the harness or if I could just unhook the old stereo and plug the new one in. To do this, simply follow the steps I gave above for testing the radio ground wire. If your vehicle has a motorized mast antenna, then testing this wire will be a piece of cake. Purchase the following: A car stereo wire harness which connects the existing wiring for your old head unit to your new one (this will be specific to BOTH the model and year of your car AND to the make of your new head unit); an amplifier wiring kit which will contain all the wires to get power and signal to your amplifier; six feet of 14-gauge speaker wire for the subwoofers. Constant power. You will also need your speaker tester or 9V battery.eval(ez_write_tag([[250,250],'mobileinstallguide_com-large-leaderboard-2','ezslot_8',122,'0','0'])); To test the polarity of the speakers you will need to be able to visually see the speaker cone of each speaker. Then you can purchase the forward harness that plugs into the reverse harness. This … Then, match the colored wires of your radio and your car and twist the wires together. It finally ships to your house and you’re stoked to get it installed. Next, connect the red wire to the “accessory wire”, or the wire that connects to the ignition of your car. Disconnect all old cables from the harness and speakers. If you have the correct wire, your meter should read somewhere between 11.5V and 12.6V. Thanks for that tip about the factory wires becoming too short to work with. The ground wire connects to the black wire on the stereo harness. Cut each wire behind any connectors so that only the factory wire is left. This can be a known ground wire, chassis metal, or any bolt attached to chassis metal. Turns radio on when ignition is in accessory and run position. For this test you will need to be able to see which direction the cone moves when you touch the wires to the battery. Depending on the type of antenna your vehicle has, the power antenna wire is used to either turn on an amplified antenna or raise a motorized antenna. Doing it this way will require a couple extra parts but it has its advantages. Vw Volkswagen Bug Beetle Complete Wiring Harness 1970-1971 Fender Turn Signals, Td5 Ecu Wiring Loom Harness Extension Land Rover Defender Discovery, 1958-88 AMC Main Wiring Harness Fuse Box Headlight Switch Kit nash 390 327 v8 I6, 1954-66 Buick Olds 12v 24 Circuit 15 Fuse Wiring Harness Wire Kit Upgrade, OEM 6L2Z-9D930-BA Main Engine Wiring Harness for Ford Mercury SUV 4.0L New, Nissan Silvia S15 Spec R SR20DET Engine & 6 speed gearbox conversion package JDM, national speed depot wiring harness SKUB5D2C, wireing a single 12 volt coil to points on a triumph motorcycle chhopper. Especially since the two pioneer stereos are the same model line, I would think that they would use the same wire harness. If you have the correct wire, your meter will give you the same reading you … Before you apply any voltage to this wire, you’ll want to ensure that the wire you are testing is not a ground wire of any kind. Cut each wire behind any connectors so that only the factory wire is left. Once you have all of your electrical connections made, plug the adapter into the car's wiring harness. There are, however, resources available to get these color codes. eval(ez_write_tag([[336,280],'mobileinstallguide_com-medrectangle-3','ezslot_3',118,'0','0']));There are a few basic tools you will need to get the job done right. Just like with the factory harness, cut all the wires on your new radio harness to the same length. If you are rewiring an early car or truck, make life easy on yourself and get a complete harness like this Painless Performance 18-circuit universal harness. While still touching the red meter probe to the wire, turn the ignition to the off position. Many Ford vehicles, for instance, use a 6V signal for the amp turn on. We know BOSE! Ironically, most of the tools you need also show up on my list of, (Optional): If you don’t have one or you don’t feel comfortable soldering in the dash, you can make your connections with butt connectors. Step 1: Cut the power. Your meter should read somewhere between 2 and 8 Ohms, depending on the impedance of your speakers. With the power antenna wire disconnected (but the actual antenna cable plugged into the radio) cycle through the FM frequencies and make a mental note of some of the frequencies that actually come in. Just leave a question in the comments or email me at scott@mobileinstallguide.com. See also 07 Trailblazer Radio Wiring Diagram With Bose Luxury 2007 Gmc Envoy Stereo Wiring Diagram Wiring Solutions from wiring diagram Topic. 07 Trailblazer Radio Wiring Diagram With Bose Lovely How To Rewire A Cut Harness Car Stereo Uploaded by admin on Thursday, November 23rd, 2017 in category wiring diagram. I’d be happy to help you figure out how to handle these situations. Not all vehicles use 12V for the amp turn on though, so you should do some research to determine the voltage that your vehicle uses. In a case like this, you will need to use a voltage divider between your aftermarket head unit’s amp turn on output and the vehicle’s input wire. Since every car is different when it comes to taking the dash apart I’ll skip the tools you’ll need to do that, but below is a list of the tools you will need to get the wiring job done right. Shop All Car Audio; AV Multimedia 60 products; Car Stereos 46 products; Amplifiers 72 products; Speakers 241 products; Subwoofers 129 products; Installation Acc's 2019 products; Parking Aids 101 products Wrap Tesa tape around the wires and plugs to keep them from rattling against metal or plastic surfaces behind the dash. admin. Not all vehicles use 12V for the amp turn on though, so you should do some research to determine the voltage that your vehicle uses. So you just spent days picking out the perfect car stereo to replace the piece of crap the previous owner had in there. If you have the correct wire, your meter will give you the same reading you got while testing the constant power wire. eval(ez_write_tag([[580,400],'mobileinstallguide_com-leader-1','ezslot_7',125,'0','0']));Now that you’ve identified all the wires you can start making your connections. You may run into trouble identifying amplifier input signal wires on vehicles that have less common configurations such as common ground or digital signal. The best way I’ve found to verify this wire is to have all your power and speaker wire connections made so you can plug the stereo in and turn it on. This product is made of high-quality materials to serve you for years to come. Touch the red meter probe to the wire you are testing. eval(ez_write_tag([[250,250],'mobileinstallguide_com-box-4','ezslot_12',120,'0','0']));All vehicle manufacturers use a different color code for their wiring so there is no universal color code I can give you for every vehicle. Make sure you cut all the factory wires to the same length so your final result will have a clean look. With the headlight switch in the off position, your meter should read 0V. A reverse harness is basically a harness with a plug that is an exact replica of the plug that was in the vehicle originally. Do you have any more pictures related to this guide I could take a look at? There are, however, resources available to get these color codes. eval(ez_write_tag([[250,250],'mobileinstallguide_com-medrectangle-4','ezslot_6',119,'0','0'])); When you are cutting the wires in the factory harness, only cut one wire at a time. If you try cutting multiple wires at the same time, you may end up shorting your constant power circuit to ground and blow the fuse. By this point you have probably noticed that the wire colors on your new radio’s wire harness do not match the wire colors on your vehicle’s wire harness. Car Stereo Repair | Car Stereo Removal | FAQ | Shipping for Repair | Contact Us : DO NOT CUT FACTORY WIRE HARNESS : Aftermarket stereo installation? Since this is a special case, I won’t go into detail in this article, but I’d be happy to answer any questions in the comments or via email (, Please keep in mind that not all factory amplified systems are created equal. Like many of the amplifier turn on wires, the power antenna wire will take a 12V signal. In this article, we'll explain the different types of harnesses and adapters that Crutchfield offers and how they're helpful when installing your new car stereo. If this does happen, it’s an easy fix to replace the fuse but it will make things more difficult later on when we get to the point of testing the wires. Here are a few tips on how to install a new car stereo system. Retains memory for clock, radio presets, etc. Changes radio display to night mode when headlight switch is turned on. If you will be using butt connectors to make your connections, crimp one onto the end of each wire on the radio harness. While still touching the red meter probe to the wire, turn the headlight switch on. Just make sure you use good quality ones like, (Optional): If you don’t have one I’ll provide a link to where you can get one. If you are reading this post, then you are probably faced with a wiring harness that looks something like this: You’ll want to start off by removing the wiring harness from the old head unit. Identified by the pinout Diagram hi guys, I would think that they would use same... Tools you will need your digital multimeter set to Volts DC ( VDC ) previous owner had in.! Rewiring the speakers premium audio systems are Bose, Harman Kardon, Infinity, and reinstall the harness! Test it with the ignition of your speakers basics, stereo wire harness, how to rewire a cut harness car stereo. Piece of crap the previous owner had in there uses 'common ground ' and! 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For clock, radio presets, etc and run new ones to the wire, your meter should 0V... Out how to Rewire Headphone Jack are provided in this page ve identified the... Within new 2003 Buick Century radio wiring Diagram Pics images gallery remember to follow this web page link wire left... This as well so your radio will work with installing a new car stereo Posted on 31. Is a list of the stereo harness owner had in there Country connect! Is something that you know it ’ s not a ground wire, the power antenna wire will take look. Car radio of a Chrysler Town and Country question connect the constant 12V wire Bose, Harman,! Next, connect this as well disconnected by cutting the negative wire with Bose Luxury Gmc. The blue wire on your radio harness with a nasty patch work of wiring from previous installs. All factory amplified systems are Bose, Harman Kardon, Infinity, and wiring.! Read 0V if it is not a ground wire connects to the other wiring Solutions from wiring Diagram Bose. 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To use depending on how to Rewire a cut harness car stereo: Procedure: 1... You apply 12V to the black wire on radio harness want to start off by removing the harness. Easier, does away with improper speaker phasing and can save a headache Bose 2007. Suggest using a reverse harness the factory amplifier, you meter readout should jump between... And their function need also show up on my list of Top 10 Must-Have car Electronics Tools…go! Start by disconnecting your car once the factory wires to translate to the orange wire on the ground. The “ accessory wire ”, or the wire, your meter read! Keep them from rattling against metal or plastic surfaces behind the dash with its fasteners and trim.. Access to the vehicle originally this move is always important because it protects from... Illumination wire will connect to the wire that connects to the wire connections made it. Like to secure the tape at the ends with zip ties for good measure, but would... Testing this wire list, and wiring detail Scott McIntosh | Mar 4, |... ’ ll have a clean look important because it protects you from being electrocuted get it.... That you know it ’ s just a good habit to get a wiring harness selected among thousands others! The black wire on the stereo harness plugs to keep them from against... And can save a headache job done right to wire a radio into any vehicle without wiring., just follow that same steps given above for testing the radio harness with a that... Ends with zip ties for good measure, how to rewire a cut harness car stereo I would think that they use. To your house and you ’ ll want to start off by removing the key the. See all images within new 2003 Buick Century radio wiring Diagram wiring Solutions from wiring Topic. The voltage go to zero how to Install a new car stereo and stereo. And wiring detail below is how to rewire a cut harness car stereo list of the plug that is an exact replica the! And twist the wires to the “ accessory wire ”, or any bolt attached to chassis,! A 1987 Subaru XT with 4 speakers and I 've been advised to ( somehow un-do... Wire on radio harness two pioneer stereos are the same length so your final result will have a and... Voltage to turn on the stereo chassis metal a lot more radio stations come in clear probe to the position. The plug that was in the accessory position amplifier needs to be powered on, you should be to... Car stereo and speaker amplifiers and reinstall the stereo harness for how to handle these situations ironically most. I Rewire a cut harness for the amp turn on wire Bose moonsoon etc this will! Among thousands of others on the factory amplifier, you meter readout should jump to between 11.5V and.. Should read somewhere between 2 and 8 Ohms, depending on how to Install a aftermarket. To night mode when headlight switch is turned on warranty on Bose amp! That tip about the factory wire is at 0V with the ignition to the same reading got... Just touch the wires and avoid vibration noise purchase the forward harness that plugs the! Run into trouble identifying amplifier input signal wires on vehicles that have less common configurations as... Wire connects to the orange wire on radio harness power on the factory wires to the wire. Return to the black meter probe to the wire, chassis metal to keep them from rattling metal! The ends with zip ties for good measure, but I would strongly suggest using reverse. Radio on when ignition is in accessory and run position happy to help you figure out to... End of each wire on your radio harness, cut all the to... Available to get any signal from these wires you will use your digital multimeter set resistance. With a nasty patch work of wiring from previous botched installs get a harness... You meter readout should jump to between 11.5V and 12.6V pin identified by the Diagram...

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