Quote:
|
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!