When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2008 H3 Tail Lamp Assembly Issue - Reward For Solution!
Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
2008 H3 Tail Lamp Assembly Issue - Reward For Solution!
Is anything else wonky? Other electronics? The lights are controlled by bcm. Hopefully it is not fried.
In the harness you repaired the big red wire was constant hot for recharging battery on trailer. The big blue wire was for trailer brakes. Hopefully when shorted it didn't fry something else.
Did you put multimeter in light socket to see if hot or shorted to ground?
Everything else seems to be functioning normally. Have not put probes on the socket yet, but if it were the issue, I wouldn't have a tail light. Will have to check it at my shop tomorrow. Is there a way to test a bcm? I grabbed a bcm from another H3 that has identical specs. Can I swap them and determine if my bcm is misfunctioning?
Have you checked for a good ground on that socket? I have seen some GM taillight units lose a ground on one socket. I used a jumper wire to the ground on the other socket and it has worked.
The socket should be grounded because the backup light works and the tail light works. I did run a multimeter on the contacts within the socket and the voltage was not uniform, but rather fluctuated and when the turn signal was turned on, the voltage didn't "turn on and turn off" as you would expect to create the blinking effect of the turn signal.
So... I'm
putting more and more stock in leaning the route of having this new purchase flashed and I'll install it. Seems as though more indicators are pointing back to erratic, inconsistent, or absent signals from the BCM.
