Troubleshooting Trailer Wiring Issues
                     Troubleshooting Trailer 
Wiring Issues
Trailer Wiring Issues
Before hitting the road and you notice 
some of your lights aren’t working. Do you 
rush it to the repair shop for a wiring 
overhaul? No, the first step is to 
troubleshoot the trailer wiring. Wiring 
issues are usually easy to solve and fall 
under one of the following categories.
Does the Problem Lie with The Tow 
Vehicle or The Trailer
Disconnect the trailer from the tow 
vehicle. Test each one separately. For 
the testing, you can use either a jump 
starter pack or a standalone car 
battery.
Faulty Ground Connections
Weak or poor ground connections are 
the most common cause of wiring 
problems. Clean all connections to 
remove existing corrosion or paint 
build-up. Clean until you achieve clean 
metal.
Check Fuses & Overloaded 
Connections
Test the fuses in both the tow vehicle 
and the trailer to determine where the 
fuse problem could be. If a blown-out 
fuse is a recurring problem, then your 
lights are overloading the circuit.
Confirm Wire Connections & 
Terminals
It will save you plenty of headaches to 
change all the crimp-only connections 
to crimp and solder connections which 
are more secure. Check for loose 
connectors or wires that are attached 
incorrectly.
Click here to learn more!
Mobile Truck Repair in Gainesville
Despite all the trailer wiring 
troubleshooting, you might find that the 
trailer wiring problem is much bigger 
than these simple steps. In such a case, 
don’t hesitate to contact Road Rescue’s 
mobile truck repair service in Gainesville. 
Road Rescue will come to you and carry 
out both trailer repair and 
truck electrical repairs in Gainesville. 
Contact Us Today 
Road Rescue, Inc. [email protected] 
Gainesville, Georgia 30501 [email protected]
770-891-6789 RoadRescueInc.com