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Radio Ignition Switched 12V+ Wire: Class 2 Serial Data

Im trying to install an aftermarket stereo in my 20004 silverado 1500 but when i connect the red ignition wire from the stereo to the Radio Ignition Switched 12V+ Wire: Class 2 Serial Data from the truck it drains the battery

Posted by Anonymous on

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Posted on Jan 02, 2017

Gozer
  • 435 Answers

SOURCE: Im installing an aftermarket stereo in my 2002

This vehicle does not have a switched power suppy in the factory harness. The orange wire in the car harness is a constant 12 volts.
To resolve connect the 12 volt power supply from the head unit to a switched circut at the fuse block and this will resolve your problem.

Posted on Sep 08, 2010

emissionwiz
  • 75130 Answers

SOURCE: Need to know what color the 12V ignition wire

here is the factory wire diagram colors from the Olds manual.
2003 Oldsmobile Bravada Car Radio Stereo Audio Wiring Diagram
Car Radio Constant 12v+ Wire: Orange
Car Radio Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Posted on Jun 18, 2009

  • 507 Answers

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.

Posted on Oct 15, 2009

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2 Answers

Trying to install a aftermarket radio in my 2004 Oldsmobile Alero I wired color it won't come on


You wired color ? Hooking up an aftermarket radio on your vehicle requires a special interface module , that may not be the name it's called . You better check at a stereo shop that installs radios . Your vehicles radio is connected on what is referred to as class 2 serial data communication network .
Class 2 Serial Data Link
The following modules use the class 2 serial data link to communicate with each other:
?€¢
The body control module (BCM)


?€¢
The digital radio receiver (DRR)


?€¢
The electronic brake control module (EBCM)


?€¢
The inflatable restraint sensing and diagnostic module (SDM)


?€¢
The powertrain control module (PCM)


?€¢
The radio


?€¢
The vehicle theft deterrent (VTD)

The class 2 serial data link also allows a scan tool to communicate with the above modules for diagnostic and testing purposes.
The class 2 serial data link on this vehicle is configured in a star pattern. There is no redundant path for the serial data to flow through. If a class 2 serial data circuit develops an open condition, the module connected by that circuit will not be able to communicate.
If not hooked up right the vehicle may not even start .

Jul 31, 2016 | Oldsmobile Cars & Trucks

1 Answer

I'm installing a aftermarket stereo in my 2005 grand am se the wire harness adapter for my car requires I run the accessory wire to one of my fuses for whatever reason I need to know which one thanks


Are you aware of the fact that your factory radio is connected to the class 2 serial data communication network . You need a interface module to hook up to aftermarket radios . If you don't use this interface module your vehicle will not start an run an the warning chimes will not work .
The audible warnings alert the driver of a system concern or a critical vehicle condition. The radio generates the audible warnings through the left front speaker. The radio receives audible warning requests via the class 2 serial data line. If the radio receives multiple audible warning requests, the warning with the highest priority sounds first. The following lists the audible warning priority and the pulse rate:

Dec 11, 2015 | Cars & Trucks

1 Answer

New stereo hook up


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

Mar 01, 2017 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

After market radio install


what you need is to go on line " crutchfield " .com , they have wire diagrams for all vehicles, and aftermarket stereos , you need to know how to use your existing stereo wires to connect your aftermarket stereo wires to these wires ! crutchfield can show you how to decifer the color codes so you can connect these wires ! its very easy, just buy somthing from them , like the connectors you'll need to do this, get it. good luck

Jan 12, 2013 | 2004 Chevrolet Express

1 Answer

Need Car Stereo Wiring Diagram


Here you go. Be careful this can disable the truck in some models due to the radio system be tied into the factory anti theft system..

2009 Chevrolet Tahoe Stereo Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: The radio harness does not provide a switched power source. The accessory turn-on is controlled by the lan serial network. Run a wire to the fuse box or ignition switch harness.
Car Radio Ground Wire: Black
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: The radio harness does not provide a dimmer wire. The dimmer wire is controlled by the lan serial network.
Car Stereo Antenna Trigger Wire: The radio harness does not provide a antenna trigger wire. The antenna trigger wire is controlled by the lan serial network.
Car Stereo Amp Trigger Wire: The radio harness does not provide a amp turn on wire. The amplifier turn on is controlled by the lan serial network.
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Jul 27, 2012 | 2009 Chevrolet Tahoe

1 Answer

Installing aftermarket stereo in 99 silverado which wires from stock harness connest to aftermarket harness


connect the wires as indicated below

1999 Chevrolet Silverado C1500 Wiring, aftermarket stereo wire colors

Car Radio Battery Constant 12v+ Wire: Orange, yellow
Car Radio Accessory Switched 12v+ Wire: Yellow, red
Car Radio Ground Wire: Black, black
Car Radio Illumination Wire: Gray (Tape off) not used
Car Stereo Dimmer Wire: Brown (Tape off) not used
Left Front Speaker Positive Wire (+): Tan, white
Left Front Speaker Negative Wire (-): Gray, white/black
Right Front Speaker Positive Wire (+): Light Green, gray
Right Front Speaker Negative Wire (-): Dark Green, gray/black
Left Rear Speaker Positive Wire (+): Brown, green
Left Rear Speaker Negative Wire (-): Yellow, green/black
Right Rear Speaker Positive Wire (+): Dark Blue, purple
Right Rear Speaker Negative Wire (-): Light Blue, purple/black

Oct 22, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

The wiring harness. To the stereo has been cut. I need to install oem stereo and don't know where to start to find which wire hold the ground or power.


1998 Chevrolet Malibu Car Stereo Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4? x 6?
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6? x 9?
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Hope this helps (remember to rate this).

Nov 05, 2010 | 1998 Chevrolet Malibu

1 Answer

Im installing an aftermarket stereo in my 2002 Grand Am.. I bought an expensive harness and its not working.. I have the radio working, but the ignition wire from the radio is hooked up to battery...


This vehicle does not have a switched power suppy in the factory harness. The orange wire in the car harness is a constant 12 volts.
To resolve connect the 12 volt power supply from the head unit to a switched circut at the fuse block and this will resolve your problem.

Sep 08, 2010 | 2002 Pontiac Grand Am

1 Answer

Im installing a new head unit. and i was looking for a wire diagram to help me out


2005 Chevrolet Silverado Car Stereo Radio Wiring Diagram Radio Constant 12V+ Wire: Orange
Radio Ignition Switched 12V+ Wire: Class 2 Serial Data
Radio Ground Wire: Black/White
Radio Illumination Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amplifier Trigger Wire: Pink
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

Jul 09, 2010 | 2005 Chevrolet Silverado 1500 2WD

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