running lights do not work...on any trailer
2004 Chevy Tahoe Z71 I have no running lights coming out of the tahoe
connector but have brakes and turn signals
Same thing happened on my Yukon, took the trailer connector apart and found the wire had corroded off, the plug had leaked and all of the connections were in bad shape, so I had to cut back the wires until I found good clean wiring, added more wiring and soldered and shrink wrapped the connections and replaced the trailer connector hopefully with one that doesn't leak and flex seal sealer on the connections on the plug. Possibly yours is suffering the same corrosion problems.
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