cjacksonlasd

UPDATED POST: 2021 32 FT BOATMATE TRAILER RUNNING LIGHTS NOT WORKING. New 2025 GMC AT4 HD. Running lights on 32ft 2021 BOATMATE Trailer won't turn on. Repairs done so far: 1) New 7 pin Plug - No change in Lights. 2) Bought 7 Pin plug tester, all lights light up corresponding test light with no issues. 3) Purchased Furrion Camera Adapter plug at recommendation of others, when turning on truck, the running lights work for about 2 seconds, then they shut off and I hear a humming start from the Furrion Adapter. 4). Purchased another Adapter at recommendation on Amazon, no impact at all. Twice while testing with it, I saw the LED lights go on for a blip only, could not reproduce results. 5). Running Lights turn on fine in my Dodge Durango. I feel the issue must be the truck or some combination. The lights work fine on Dodge Durango, and they light up for a second on the GMC, and tester shows the GMC lights are sending power, can't figure out what is causing this .