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Old 12-27-2018, 04:50 PM   #16
lmichel
Member
 
Brand: Thor Motor Coach
State: New York
Posts: 55
THOR #10644
DEC 27th Troubleshooting - Backup Lights NEVER off

Christmas holiday kept me from pursuing this issue, but today I got back to it.

Sure enough, pulling F34 and then checking pin 5 of the Reverse Lamp Replay showed 0.0 volts. The voltage was also not a few floating mV - typical of an unconnected circuit. This dropped right to ground when F34 was pulled and went right to 13.25V with F34 installed.
Thanks Lug!

jnschnit, thanks for uploading the component location diagrams. I'd like to find the head-end of the trailer light connector and pull it. A) I don't even need it for now, and B) I'll bet I can check each pin of it and figure out which wire is feeding back..
This is also a very good hunch, since I was in the dash just a few days before this whole trouble started. I wouldn't doubt that I unknowingly bumped something..even as careful as I was.

Let me know if you guys have a better idea. So far, you've been leading me through this step-by-step perfectly ;-)
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