Interior Lights On A Hawk Trailer Pulled By A 2021 GMC Sierra 2500 Not Working

Question:

We purchased a new Hawk trailer. In receiving the new trailer we found the always hot was not powering the interior trailer lights. The trailer tested it and confirmed no power. She thought it may be a fuse but I am unable to determine what fuse it may be. One article thought it may be the 30A fuse in position 63 however, that seems good. Since that article was a little vague I thought Id ask specifically what to check and get your lead on solutions.

asked by: Dennis P

Expert Reply:

The number 63 fuse is the correct fuse to check on your 2021 GMC Sierra 2500, and it should be your trailer battery circuit.

Since you said you checked out the #63 fuse, and it's all good, I recommend checking your 7-way connector/receptacle.

You'll want to ensure that your connectors are free from debris and not corroded. You'll then want to use a circuit tester like the Hook Probe Circuit Tester # PTW2993 to test for continuity at the 1 o'clock position on your vehicle side 7-way connector.

Or

Even easier, you can use the Pollak 7-Way to RV Socket LED Circuit Tester # PK12741 which will just plug into the 7-way socket on your vehicle, and the LED lights on the plug will light up if there is continuity.

If you are not getting continuity then the issue is with your wiring, and you'll need to comb through the wiring and inspect for pinches/frays as this is likely source of your problem.