No tail light, no radio button, no heater control light
Senior Member
Joined: 08-03-2010
Posts: 3,564
From: Lake Ronkonkoma, N.Y.
Thread Starter
New Member
Joined: 03-02-2018
Posts: 28
From: Va
OK guys I Took it to the mechanic, he unplugged the BCM to check the continuity, it was good plugged it back in everything works as normal now. So all this freaking time it seems like it may have just been a loose connection inside that plug.
Thread Starter
New Member
Joined: 03-02-2018
Posts: 28
From: Va
Im baaackkkk. The damn problem is still there. As stated above, everything was working after picking it up for a couple days, so I took it back to him. He still couldn't find anything, says he thinks its the BCM, but not 100%. I dont know if I stated this, but he could make them work fine when he touched one of the prongs on the relay with a grounded test light. He told me he did all he knew to do and maybe the dealer could do more. So after 1 hour at dealer, $100, I know more than they do. They checked bulbs, fuses, grounds, relays lol everything I told them I checked. So by a vote, do yall think it is the BCM? What else tells the lights to turn on other than the switch which is new.
Thank you all for the help, but if we can figure this out quick its going to auction, dont want to drop $1000 into it and that is what is gonna happen if the dealer keeps messing with it.
Thank you all for the help, but if we can figure this out quick its going to auction, dont want to drop $1000 into it and that is what is gonna happen if the dealer keeps messing with it.
Moderator
Joined: 01-23-2009
Posts: 26,484
From: Fredericksburg,VA
If you are willing to bet that one transistor in the BCM has gone bad, go ahead.
If a new BCM does fix it, more than likely it is playing with the wires and connectors that did the job.
Pin 86 on the relay is a signal from the BCM, it supplies GROUND. That GROUND comes from G203 behind left end of the dash. Pin 85 is always hot.
The turn/stop/tail/markers all join together at J403 33CM from the breakout to the right side lights. (I would look here, that is the place people like to splice into for hitches)
If a new BCM does fix it, more than likely it is playing with the wires and connectors that did the job.
Pin 86 on the relay is a signal from the BCM, it supplies GROUND. That GROUND comes from G203 behind left end of the dash. Pin 85 is always hot.
The turn/stop/tail/markers all join together at J403 33CM from the breakout to the right side lights. (I would look here, that is the place people like to splice into for hitches)
