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2004 Monte Carlo BCM

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=46505
Printed Date: May 02, 2025 at 7:13 PM


Topic: 2004 Monte Carlo BCM

Posted By: Jimsi01
Subject: 2004 Monte Carlo BCM
Date Posted: December 31, 2004 at 4:36 PM

Can somebody tell me where the 2004 Monte Carlo SS BCM is and describe it?   I must be thick!  I have the kick panels off.  Is it next to the harness that has the brake light wire? What color,etc, please?   A picture would be better, or maybe you could come to my house. (Kidding!!)



Replies:

Posted By: NowYaKnow
Date Posted: December 31, 2004 at 7:19 PM
The BCM is in the driver underdash/kick panel area near the firewall. You can see a few large plugs down there. Not the easiest to work with, I don't go to the BCM in that car for any connections say let us know what your installing and maybe we can give you some better tips.

Mike




Posted By: KarTuneMan
Date Posted: December 31, 2004 at 11:30 PM
Theres a guy in north Carolina that has a collection of some 1100 barf bags

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Posted By: Jimsi01
Date Posted: January 01, 2005 at 1:38 AM
I'm installing just a remote starter.  Need parking light, door locks, trunk release, factory disarm, and I'd like to do windows up and down.  All other wiring doone already. thanks!! 




Posted By: KarTuneMan
Date Posted: January 01, 2005 at 1:49 AM
12volts red (x2) (common 60A)  +  ignition harness
Starter yellow  +  ignition harness
Second Starter N/A    
Ignition pink  +  ignition harness
Second Ignition dk. green  +  ignition harness
Third Ignition N/A    
Accessory orange  +  ignition harness
Second Accessory brown  +  ignition harness
Notes: This wire must be powered as an accessory wire. If powered as a second ignition, the car will not crank.
Keysense lt. green  -  ign harn or BCM, gry 16P plg, pin B1
Notes: The BCM is under the driver side dash, above the parking brake lever.
Power Lock ORANGE / black  -  BCM, gray 24 pin plug, pin B3
Notes: Lock is negative trigger thru a 470 ohm resistor. Unlock is a straight negative trigger. MUST use relays.

The BCM is under the driver side dash, above the parking brake lever.
Power Unlock same as power lock wire    
Lock Motor see notes    
Notes: Installation of factory keyless upgrade alarm is not recommended on this vehicle because the door lock motor wires rest at approximately 7 volts.
Unlock Motor see lock motor notes    
Parking Lights+ yellow (F), BROWN / white (R)  +  passenger junction block end of dash
Parking Lights- white  -  BCM, pink plug, pin A2
Notes: The BCM is under the driver side dash, above the parking brake lever.

Must diode isolate this wire from the BCM to avoid Service Engine Soon light. See DirectFax document 1600 for wiring information.
Hazards same as turn signal wires    
Turn Signal(L) lt. blue (F), yellow (R)  +  turn signal switch
Turn Signal(R) dk. blue (F), dk. green (R)  +  turn signal switch
Reverse Light lt. green  +  passenger junction block end of dash
Door Trigger dk. blue (L), dk. blue/wht (R) -  BCM, gray 16 pin plug, pins A8, A1
Notes: Use both wires and diode isolate each. Have to also diode isolate from the BCM to prevent false alarms. Refer to DirectFax document 1076 for wiring information.

The BCM is under the driver side dash, above the parking brake lever.
Dome Supervision gray  -  BCM, gray 24 pin plug, pin A8
Notes: The BCM is under the driver side dash, above the parking brake lever.
Trunk/Hatch Pin RED / black  -  BCM, gray 24 pin plug, pin A11
Notes: The BCM is under the driver side dash, above the parking brake lever.

Have to also diode isolate from the BCM to prevent false alarms. Refer to DirectFax document 1076 for wiring information.
Hood Pin N/A    
Trunk/Hatch Release black  -  BCM, gray 16 pin plug, pin A7
Notes: The BCM is under the driver side dash, above the parking brake lever.
Power Sliding Door N/A    
Factory Alarm Arm arms on lock with door open    
Factory Alarm Disarm lt. green  -  BCM, gray 16 pin plug, pin B3
Notes: The BCM is under the driver side dash, above the parking brake lever.
Disarm No Unlock see factory alarm disarm    
Tachometer white  ac  Ignition Control Module
Notes: On the 3.4L it is on the top center rear of the engine. On the 3.8L it is on the top right front of the engine.
Wait to start N/A    
Brake Wire white  +  brake pedal switch
Parking Brake lt. green  -  BCM, gray 16 pin plug, pin B6
Notes: The BCM is under the driver side dash, above the parking brake lever.
Horn Trigger black  -  BCM, pink plug, pin B5
Notes: The BCM is under the driver side dash, above the parking brake lever.
Memory Seat 1 N/A    
Memory Seat 2 N/A    
Memory Seat 3 N/A    
posted_image
Immobilizer Bypass Module:Required: YesType: Passlock 2Part #: 555L or 555T
Notes: The Passlock 2 wire colors are yellow, black, and white (not used). Standard on all models


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