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Old 05-08-2022, 05:32 PM   #1
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Ted DuPuis's Avatar
Join Date: Sep 2020
Posts: 317
2000 HR Endeavor Turn Signal Issue

Iíve been working on an electrical (lighting) issue on my 2000 Holiday Rambler Endeavor. I had multiple issues going on as it turns out and had a bad trailer harness adapter (removing that fixed most of my problems). However I am now trying to figure out whatís going on with my right turn signal.

With headlights off, right turn signal works correctly and as intended. The right side marker light (side of the bus, just ahead of the rear wheel) blinks opposite the front/rear turn signal as itís supposed to, same as the left.

With headlights on, the right turn signal indicator is always on on the instrument cluster. The right side marker light is NOT on (left side is). When I turn on the right turn signal the indicator blinks correctly, as do the front/rear turn signals. The marker light does NOT blink.

I have wiring diagrams but I was not able to figure out where this interconnect existed that might tie the marker light and turn signal together but only on the right side, nor am I sure how that is triggered. I had thought it might be a 3-wire marker light that handled that internally, but I removed it and confirmed that itís 2-wire.

Any suggestions appreciated!
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Old 05-08-2022, 06:02 PM   #2
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Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,170
Sounds like a missing or poor ground. It's seeking a different ground path. Spent way too much time fixing trailer lights and darn chassis only grounds a lights. Two ground wires in one end of butt connector cause issues look in looms for taped up butt connectors un-tape examine butt connectors. Also broken bulb elements can cross , dirty rusty dual element bulb sockets can cause similar issue. Check shorted trailer plug wires sockets lastly trailer/toad module also.
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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