2003 H2 alarm wiring info
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=25479
Printed Date: July 15, 2025 at 3:38 AM
Topic: 2003 H2 alarm wiring info
Posted By: draasch
Subject: 2003 H2 alarm wiring info
Date Posted: January 29, 2004 at 9:06 AM
does anyone have any info and/or tips for this car?? ------------- Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt
Replies:
Posted By: draasch
Date Posted: January 29, 2004 at 9:12 AM
i found my wiring info for that truck...however if anyone has any tips send them on.
thanks ------------- Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt
Posted By: Big Dog
Date Posted: January 29, 2004 at 9:12 AM
try this
HUMMER » H2 » 2004
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. It has 6 plugs in it, the purple plug is on the back.
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
Posted By: bmf1000d
Date Posted: January 29, 2004 at 9:58 AM
yeah its like doing a yukon david same car diffrent body
-------------
"Big" Mike
Double Take
Fremont, Ne
remember to check all your wires with a dmm not a test light!!
i take no responsibilty whatsoever for the vailidty of the info nor consequences thereof
Posted By: Teamrf
Date Posted: January 29, 2004 at 3:00 PM
Let me know how the alarm comes out on this car. I've always been afraid to even touch one of these cars because they are not cheap cars. So let us know how it comes out David.
-------------
~The Rookie~
Rookie of the year that is...
Don't let the smoke out of your equiptment..it doesn't go back in.
Posted By: NowYaKnow
Date Posted: January 29, 2004 at 5:25 PM
"does anyone have any info and/or tips for this car??"
The only tip I have is if you don't feel like taking the whole truck apart there is 1 screw that the radio bezel covers that holds the underdash panel on. Take a razor knife and score the tab (near the bottom left of the radio bezel) that holds that screw once or twice and you can break it off there. Saves you from dismantling half the truck just to get the underdash panel off. If you go crazy hiding things may be a better idea to take it all apart it's up to you.
Also not related to your install but there is a antenna disconnect in the pass kick you can use if doing an FM mod or something and have no reason to take the rest of the truck apart. Such as for an overhead tv or headrest tv's..Even a changer if you find somewhere else to mount the controller.
"I've always been afraid to even touch one of these cars because they are not cheap cars"
True they aren't cheap but it's basically just a GM suv in sheeps clothing..You'll laugh once you take one apart..It definately isn't in the same league with cars you should be scared of. Just try not to mention to the owners that their hummer is basically a tahoe or a yukon they don't seem to like that.
Good luck,
Mike
Posted By: jrilla
Date Posted: January 29, 2004 at 5:58 PM
Speaking of not mentioning things to owners, I can only assume you dont mention that you make a few cuts in the dash and then snap off the panel to avoid removing a screw.
-------------
J Rilla
Owner/Installer
Posted By: NowYaKnow
Date Posted: January 30, 2004 at 6:14 AM
"Speaking of not mentioning things to owners, I can only assume you dont mention that you make a few cuts in the dash and then snap off the panel to avoid removing a screw."
Of course not  If you were to misplace a screw or somehow end up with an extra screw at the end of an install, would you mention it? If you scratched a panel that is not visible, would you mention it? Obviously there is a difference between accidents and purposely doing something, but I don't feel it is that big of a deal. If your not comfortable doing it, by all means don't just offering some tips..We do a rediculous amount of H2's only logical to find some time savers..Good luck,
Mike
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