Is it possible that a fuse is getting blown when you hook up the trailer? I would focus on the vehicle side of the equation to begin troubleshooting, without the trailer connected. This way you can start with a clean slate, and concentrate on getting the vehicle lighting back to functioning as it should.
To start, I would recommend disconnecting the black power wire from the # C59496 wiring harness from your vehicle battery. Then, disconnect the positive and negative cables from the... view full answer...
The first thing to check for a factory fuse that is missing or blown. Check the vehicle owner's manual for any and all fuses related to the tow package wiring so you can check them.
If all the fuses are good and in their proper places, then you will need to test the harness to determine if it is the problem. Use a circuit tester such as # PTW2993. Test the wiring going into the converter from the vehicle. If there is no power, there then the issue is a fuse or a wiring issue on the vehicle... view full answer...
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