MK7 Golf Hatch Lights Failed

My inner rear tail lights have failed, although one reverse and fog still light. The other lights are ok when voltage is applied to them.


All the codes are similar: B12BE15 Right rear light; short circuit to positive. B12C815 Right rear fog light open circuit etc

When I bought the car, it looked like the hatch had been replaced (frags of glass in boot well), is wrong sub loom possible?


I've had a look at the wiring entering the hatch which looks ok.


So, is this a failed BCM, BCM coding issue or a wiring problem?


I don't want to shell out on coding software unless I need it.

It could be any one of the problems you suggest, if you don't own VCDS then it may be best to sign up to a Golf 7 owners forum and ask if any owners have had a similar problem.

The local garage will scan and give me the read for a small sum. But I guess I can't post it?

Get yourself a VCDS enthusiast cable. You can then use it for the next issue, tweaks and retrofits.

I disconnected the tailgate plugs and scanned again. CAN and short faults have gone. So it looks like the sub loom is incorrect.

Motobrox said:

I disconnected the tailgate plugs and scanned again. CAN and short faults have gone. So it looks like the sub loom is incorrect.

Click to expand...

Time to buzz it out with a digital multi-meter.

PetrolDave said:

Time to buzz it out with a digital multi-meter.

Click to expand...

I'll get back on it tomorrow. I'll need to strip of the trim and get at the part label. There's 8 pins on one plug coming in and 5 coming out. So it looks like the wrong loom.