I am trying to install a new Sony stereo (WXGT90BT) on my 2003 Chev Silverado LS. I could not find an adapter harness online, checked wiring diagrams and it seemed like it should be fairly simple, so I cut the plug off and wired it up to the stereo supplied connector. When I plug the stereo in, I get a whir about 2 seconds after I plug it in (I think its the cd player) However I cannot get it to turn on or anything. I checked the power and acc and ground wires in the stereo plug with a test light and they are all functioning normal. There are a couple wires on the stereo plug that I was not able to wire up as they had no corresponding wires on my truck wiring harness. My truck wiring harness had all 4(2 each) speaker wires which were able to be wired up quite simply to the stereo harness. It had only 3 more wires, constant power (battery), ground, and another wire which is labeled as a serial 2 data wire which goes to the dat system in the truck. I determined that the data wire is what supplied acc power to the stereo and I think it also supplied illumination to my previous OEM stereo. I had 2 wires left over from my stereo harness: Amp and illumination. I know that the amp wire does not need to be hooked up (obviously I don't have one) but does the illumination wire need to be hooked up somewhere for the stereo to function? Or do I possibly have my wiring wrong with the acc power wire?
You better read up on class 2 serial data communication networks . Does supply ACC voltage to anything . Your vehicle has many different control modules , PCM / ECM , air bag , ABS , BCM instrument cluster ,an the radio an some others . If you mess with or ground this wire your vehicle will not start or do anything .
The data link connector (DLC) allows a scan tool to communicate with the class 2 serial data line. The serial data line is the means by which the microprocessor-controlled modules in the vehicle communicate with each other. Once the scan tool is connected to the class 2 serial data line through the DLC, the scan tool can be used to monitor each module for diagnostic purposes and to check for diagnostic trouble codes (DTCs). Class 2 serial data is transmitted on a single wire at an average of 10.4 kbps. This value is an average; class 2 uses a variable pulse width modulation to carry data and depending on the message it may operate faster or slower. The bus will float at a nominal 7 volts during normal operation. Each module can pull this lower during the transmission. The bus is not at battery positive voltage or ground potential during normal operation. When the ignition switch is in RUN, each module communicating on the class 2 serial data line sends a state of health (SOH) message every 2 seconds to ensure that the module is operating properly. When a module stops communicating on the class 2 serial data line, for example, if the module loses power or ground, the SOH message it normally sends on the data line every 2 seconds disappears. Other modules on the class 2 serial data line, which expect to receive that SOH message, detect its absence; those modules in turn set an internal DTC associated with the loss of SOH of the non-communicating module. The DTC is unique to the module which is not communicating; for example, when the inflatable restraint sensing and diagnostic module (SDM) SOH message disappears, several modules set DTC U1088. Note that a loss of serial data DTC does not normally represent a failure of the module that set it.
On some vehicles, if the powertrain control module (PCM) is unable to communicate with the vehicle theft deterrent (VTD) system after the vehicle has started, the PCM will consider the VTD system to be malfunctioning. The PCM will enter a fail enable state and will command the security indicator to illuminate. When the PCM is in a fail enable state, the vehicle will NOT stall or stop running. If the PCM is in a fail enable state when the ignition is switched OFF, the PCM will remain fail enable until communications with the VTD system has been restored. When the PCM is in a fail enable state, the VTD system is NOT active and the vehicle will start. This feature is NOT available on all GM vehicle lines.
You need a interface module for your radio to work . Go to a professional installer place an talk with them . Your vehicle may not have all of these modules , but most .
Class 2 Serial Data Line
The class 2 serial data line on this vehicle is a star configuration. The following modules communicate on the class 2 serial data line:
• The body control module (BCM)
• The digital radio reciever
• The driver door module (DDM)
• The electronic brake control module (EBCM)
• The front passenger door module (FPDM)
• The HVAC control module
• The inflatable restraint sensing and diagnostic module (SDM)
• The instrument panel cluster (IPC)
• The memory seat module (MSM)
• The powertrain control module (PCM)
• The radio
• The radio amplifier
• The rear seat audio (RSA) controller
• The rear seat entertainment (RSE) assembly w/U42
• The rear wheel steering control module
• The remote playback device-CD player w/U1S
• The transfer case shift control module
• The transmission control module (TCM) w/Allison Transmission
• The theft deterrent control module
• The vehicle communication interface module (VCIM) w/UE1
GM Class II RDS Radio 12V Ignition Wiring
SOURCE: installing after market stereo
Dave,
You will need to go buy a wiring harness adapter from your local Walmart (usually cheapest there) or Local Electronics place (ie Best Buy). The wire harness that goes out from the radio goes into the Adapter and the adapter plugs into the car harnesses. Also these Adapters come with the wiring diagrams for your vehicle. They typically run 10 - 15 bucks depending on where you get them. Thanks for using FixYa!
Sincerely,
JC
SOURCE: Tapping into my cigar lighter wire to wire in my stereo?
Yes you can wire it to the cigar lighter. The only problem is you will have to manually shut the radio off. I would find a 12v source with power only in ignition on position . You can go to the ignition switch for that. Good luck.
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SOURCE: I am installing an aftermarket stereo in my truck
i belive the bigger should be the switch power. all the constant should do is keep your memory alive and the clock ticking. it would take more power for the radio to actually work. and did you buy an install kit? if you did all the directions would be really simple.
SOURCE: tail light wiring connectors and wiring diagram
A test light checking each connector would be faster and easier to do. Maybe somebody may have a illustration for you but by far a simple test light is all you need with a helper turning on the different lights as you check them out and writing all your findings down
SOURCE: i just hooked up a new pioneer stereo in my 04
The illumiation wires can just be capped off they aren't always used on aftermarket radios. It could be fluke instance that your battery died and you got the check engine light. I would take it to your closest autoparts store and have them read the codes most will do it free of charge and go from there.
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