Fuse Blows in 2008 Silverado 2500 Trailer Wiring After 10 Miles of Driving

Question:

I have a wiring harness for a trailer. problem: I have a 4 wire plug for the trailer ground left and right turning signal parking lights the problem: the trailer parking lights work the fuse blows after 10 miles this is a 15 amp fuse what do u think is the problem for the blowing fues? -possibly increase amp fuse? not sure what the problem is and how to fix it would apprecite if could help us in any way of what to do in this situation

asked by: Jay P

Expert Reply:

If you are blowing your trailer lighting fuses repeatedly then you either have a short in your trailer 4-pole wiring or the total load of all the lights on the trailer is more than the vehicle's circuit can handle. I do not recommend increasing the fuse value above the value indicated; this can cause damage to the vehicle's wiring which can be costly to repair.

First, check that the wiring harness on the trailer is free of damage. Check areas where the wires have to make sharp bends and where the wires may touch the trailer's frame. Also check for signs of corrosion on the connector; that could be causing a short that could cause the fuse to blow.

The linked article on troubleshooting trailer wiring will be helpful to you.

expert reply by: Adam R