Why does my trailer fuse keep blowing?
If a wire going to any of the running lights is exposed and touching metal it will cause a short that could blow the fuse. The other possibility is that if you added any lights to the trailer that use the running light circuit the extra power draw could be too much for the tow package wiring.
Do trailer plugs have a fuse?
Yes, trailer wiring harness # 118269 does have a fuse in a black holder just below the large black converter box. If that fuse is fine then use the vehicle owners manual to find any fuses related to tow package wiring on the vehicle to check them.
Why is my trailer not getting any power?
If you aren’t getting any power on the wires going into the connector, then the connector itself isn’t the issue. There’s something going on with the factory trailer wiring. Since all the fuses are good there’s likely a short somewhere on the wiring.
Where is the fuse located on a tow tail?
This circuit is powered by the 30A TOW TAIL fuse in the engine bay (battery) fuse box. The fuse feeds the TOW TAIL relay which feeds Pin 2 of the trailer connector. The ECU energizes this relay when the parking lights or headlights are on. I’d check the fuse and the relay.
How to troubleshoot no power at the factory plug?
Next, test the pins on the connector where the wiring harness plugs into the truck using a circuit tester like Item # 40376. This will tell you if the problem is on the wiring harness or somewhere deeper in the truck’s wiring. If everything checks out with the pins then the problem is on the harness and it can be replaced with Item # 30955.
What does it mean when a breaker or Fuse goes off?
So a breaker or fuse going off is often a sign that something else is wrong: a symptom, not a cause of your problem. The problem may be easy to fix or it may not be. Many appliances have sensors on their mechanical parts that will kick a breaker or blow a fuse rather than allow the appliance to continue running in an unsafe mode.