All of a sudden my back up lights quit. Everything else works fine. Can’t locate a fuse for them in the fuse panel.

 

the Body Control Module commands the tail lights (backup, stop & park), no relay. The BCM also talks to the rotary **** and transmission. At the tail lights, the backup line is connector C2 and pin1 for both right and left assemblies.

edit; The signal from the BCM is a voltage not a ground.

 

So can the back up circuit in the BCM be bad and the rest of the BCM still function?

 

Yes, since I only have access to the wiring and not the circuits, I don't know what the driver looks like. I would pull both tail lights off and disconnect C2 and measure the voltage on pin 1 to ground. You may have a short somewhere in one of the tail lights causing the circuit in the BCM to crowbar. For those of you unfamiliar with the term crowbar, it basically means that the voltage collapses but when you remove the short, it may recover.

 

Would you by chance know where the BCM is?

 

Start with the simple first. Have you checked the bulbs to make sure they are good?

-Rod

 

Yes, both bulbs are good. No voltage at either socket. I’ve been told to check the Body Control Module but I have no clue where it is.

 

go here for 2017 wiring

https://drive.google.com/drive/folde...Sm-3FKkrq1oXUk

large zip files but it s/b the same as a 2016

 

I don't know where the BCM is and google is not helping.