Lug, you've obviously done a significant amount of troubleshooting in the past
The trailer tow port was squeaky clean. I did check that many days ago, but gave a really good check yesterday - just in case.
I pulled F34 and the reverse lights went out.
I put F34 back and pulled F33. Again, the lights went out.
Then I turned the ignition on but didn't start the vehicle.
I put it in reverse.
When I pull F34, the lights are on in reverse and out when in park!
When I pull F33 (F34 in), the lights are out both in reverse and in park.
Now the interesting part:
My Thor has these push-in oval reverse lights. Don't even need a tool to pull them out. I pulled them to look at the connection going to each light. On the driver side light, there is a lone, red wire coming up inside the fiberglass, past the light opening and continuing on up, up as far as my flashlight can see - maybe even up under the roof. When I follow it out the other end, it comes out the bottom of the fiberglass rear cap and is tucked inside the rear bumper - along, but outside a wire loom tubing and off up into the frame somewhere. This is *very* suspicious! This really, really looks like a wire that was added after the whole unit was built.
I am the only owner of this RV. I bought it new. It's never been registered.
I think it was a repair that Camping World did when the rear awning would blow a fuse on open or closing the switch. I refused to accept delivery until they fixed it. I'll bet they rewired it quick and dirty. ....hmmmm...where is the old wire they snipped?? Not touching the frame I hope?? Am I on to something here, or is it just me? This mysterious red wire doesn't visibly involve the backup lights at all, that I can see. But it sure has my attention.
One question I *think* we can answer at this point... We can cross off the Neutral Safety Switch - right?
Thanks again for all your diagnostic help! I hope Santa brings you a shiny new wrist watch that reads OBD2 codes just by walking up to any vehicle!
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