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.
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.
When does a trailer stop and turn signal fail?
In other words, when the brake pedal is pressed, both Turn signal and Stop signals light simultaneously; or when the Turn signal is activated, both Turn and Stop signals light simultaneously. This will occur with or without the trailer connected. MOSFET failure is indicated by absence of the trailer Turn signal when the brake is pressed.
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.
How to troubleshoot a blown fuse on a trailer?
You can also test the trailer wiring for function by connecting each wire to a 12V battery. Lastly, make sure that the main trailer connector ground and all the light grounds are securely attached to clean bare metal surfaces. If you are unable to find the issue, please let me know and I will be happy to look into this further.
Why is my tow package running light not working?
If it is the tow package running light fuse that is blowing then there is most likely a short in the trailer wiring or in the trailer or vehicle side connector. What you will want to do first is make sure both the vehicle side and trailer side connectors are clean and free of corrosion inside and out.
How to troubleshoot a trailer blowing the running?
If you have a boat trailer with the wiring inside the frame you will need to pull it out to check it. Attach a string so the wires can be pulled back through the frame when done. If that does not work, you may have a bad light on the trailer. Remove each light one at a time until you find the one that solves the issue and replace it.
Why are the lights on my trailer not working?
Then you will need to trace the wiring from the connector back to each light looking for breaks, copper strands touching bare metal, or loose connections and fix as needed. You will need to figure out what is causing the short and repair it before installing another fuse.