LEFT REAR DOOR AJAR

[BITURBOAMG]

What is the bcm and can it be changed out at home?

[MDimitri]

Originally Posted by BITURBOAMG

What is the bcm and can it be changed out at home?

The BCM (BODY CONTROL MODULE) otherwise known as Chassis Brain Box, is located behind the headlight switch. It has 6 plugs in it. There really should be no reason to remove the BCM as it can be re programmed in the truck with a class 2 scanner that is capable of doing function tests. But the location of the BCM is top left of instrument panel above the fuse block. It is item number 1 in the picture.

(1)Body Control Module (BCM) - C1(2)BCM - C2(3)BCM - C4(4)BCM- C3(5)BCM - C5(6)BCM(7)Data Link Connector (DLC)(8)Fuse Block - I/P - C1(9)Fuse Block - I/P(10)Splice Pack SP205



Looks similar to the below image: With the exception that there are two more BCM connections (White rectangular multi prong box), rather than the one depicted below.




HUMMER » H2 » Wiring Colors & Specs

12 VOLTS red + ignition harness
STARTER 1 yellow + ignition harness

IGNITION 1 pink + ignition harness
IGNITION 2 white + ignition harness

ACCESSORY 1 orange + ignition harness
ACCESSORY 2 brown + ignition harness
KEYSENSE lt. green - lt. blue plug, pin a1 at bcm
Notes: The BCM (Body Control Module) is located behind the headlight switch. (See above diagram).

POWER LOCK lt. blue - purple plug, pin b3 at bcm
Can also use Directed interface module 456G.

POWER UNLOCK white - purple plug, pin b2 at bcm
Can also use Directed interface module 456G.

DISARM NO UNLOCK see factory alarm disarm
FACTORY ALARM ARM arms on lock
FACTORY ALARM DISARM lt. green - driver door module in door
DOORLOCK MOTOR gray
DOOR UNLOCK MOTOR tan

PARKLIGHTS POSITIVE brown + driver kick panel
PARKLIGHTS NEGATIVE gray/black - brown plug, pin b2 at bcm

HAZARD white - steering column
TURN LEFT dk. green + steering column
TURN RIGHT lt. green + steering column
REVERSE lt. green + black plug, pin f at bcm

BRAKE white + brake pedal switch
PARKBRAKE lt. blue - lt. blue plug, pin a7 at bcm

TRUNK PIN pink/black - purple plug, pin a1 at bcm

DOMELIGHT SUPERVISION comes on with disarm

TACH white ac pin 10, green plug at pcm
Notes: The PCM (Powertrain Control Module) is under the hood on the driver side next to the battery. The tach and vss wires are also found behind the instrument cluster. For tach can also go to any fuel injector and use the wire that is NOT pink.

MEMORY SEAT 1 red + driver door module in door
MEMORY SEAT 2 pink + driver door module in door

HORN black or black/yellow - column or gray plug at bcm

Immobilizer: Passlock 2


Hope this helps ya!

Cheers!

[BITURBOAMG]

Thanks is there anything I can do with the current bcm or do I just need to replace it? This door ajar really bugs me as I have the amp steps and the right side step stays down now as it thinks the door is open. Any help is much needed thank you.

[BITURBOAMG]

Any one have a cost on this bcm?

[HummerMann]

I couldn't find any BCMs online or on Ebay. I have an H2 '06 parts CD and the price in '06 was $298. I'm guessing it runs in the 300s now and you will probably have to go to the dealer. Have you tried disconnecting the battery and reconnecting it?

[BITURBOAMG]

No I have not, is that meant to help?

[BITURBOAMG]

Well it was ok for awhile but the right rear door is the bad sensor. It will not open the amp step or put it down. I am wondering if it is the bcm or that door's sensor. I think it is the reason my factory alarm keeps going off at random times. Out of no where the door will read ajar and the amp steps goes down then the factory alarm goes off. Is there any way to disconnect that one door so the truck wont read it open or closed?