I have a 2007 H3 and i am having a problem My flashers are stuck on, I have unplugged the hazard switch and they are still on.I have unplugged and cleaned the connectors to the bcm still stuck on. I have found the wiring diagram but have not found the pin-out for the connectors so i can see if i have a short to ground on the input.Does anyone know where i can get that or have any advice or had the same problem? I believe the bcm may have an internal problem but want to be sure before i get another one.

 

maybe check the wiring for the trailer hitch harness at the rear bumper.

 

Attached is the BCM connector pinout.

 

Thank you thats just what i was looking for!!

 

1. Disconnect the hazard switch (S205) at the dash
   
   • If lights stop: bad switch
     
   • If lights stay on: move on
     
2. Disconnect the multifunction switch (Turn signal stalk)
   
   • If lights stop: faulty stalk switch (very common GM failure)
     
3. Disconnect the input to the BCM (connector C2 pin B5 - PPL)
   
   • If lights stop: switch or wiring issue
     
   • If lights still flashing: suspect BCM is internally stuck