What to do if your running light fuse keeps blowing?
Replace the fuse and then use a circuit tester such as # PTW2992 to test the vehicle side trailer connector while someone sits in the vehicle and turns on the running lights. If it shows power and the fuse does not blow then the issue is on the trailer. If it does blow the fuse then the issue is on the vehicle.
Why does the marker light keep blowing the fuse?
Took out all the marker bulbs and checked the circuits and they are all good at the bulbs. Even with all the bulbs out turning the marker lights on still blows the fuse.
Why does the fuse keep blowing on my car?
If it does blow the fuse then the issue is on the vehicle. Likely causes of a short on a vehicle include a dirty or corroded trailer connector or damaged wiring. Make sure the trailer connector is clean (go ahead and do the same for the trailer side connector while you’re at it).
Replace the fuse and then use a circuit tester such as # PTW2992 to test the vehicle side trailer connector while someone sits in the vehicle and turns on the running lights. If it shows power and the fuse does not blow then the issue is on the trailer. If it does blow the fuse then the issue is on the vehicle.
Why are there no lights on my camper trailer?
If the problem is on the trailer, then a short on the running circuit is likely the problem. A ground issue would typically only affect one or two lights, not all of the running lights on the trailer. But it is possible that it is a ground issue.
Why does my running light keep blowing out?
You have a short circuit somewhere that is causing the fuse to blow. To determine where the short is start by disconnecting the trailer from the tow vehicle. Replace the fuse and then use a circuit tester such as # PTW2992 to test the vehicle side trailer connector while someone sits in the vehicle and turns on the running lights.
Why does the fuse keep blowing on my trailer?
If it shows power and the fuse does not blow then the issue is on the trailer. If it does blow the fuse then the issue is on the vehicle. Likely causes of a short on a vehicle include a dirty or corroded trailer connector or damaged wiring.
