Wiring
The power cord from the trailer to the card was dragging the ground and the coating was warn off exposing the exposed wire. I taped it with electrical tape but now the running lights work but not the ...
Forum Discussion
ndrorder wrote:
Here is one way to troubleshoot the issue.
1. Disconnect the trailer plug from the vehicle. If the blinkers and brake lights work on the vehicle, that's good. If not, locate, check, and replace the fuses on the vehicle.
Lots of vehicles have separate fuses for the tow vehicle's lights and the trailer lights. The tow vehicle lights working properly doesn't tell you anything. You actually need to start with step 2.
ndrorder wrote:
2. Now that the vehicle is working, use a simple test light to test the plug on the vehicle. If you let us know how many pins are in your plug, we can tell you which pins to test. If there is power to the plug, that's good. If not, there may be a second set of fuses on your vehicle for the trailer plug that are blown.
This 4 pin/7 pin trailer light tester will tell you immediately which pins are/are not working. Well worth having in the toolbox for the price. (picture below)
ndrorder wrote:
3. Now that the vehicle and the trailer plug on the vehicle are working, replace the wires on the trailer. Wiring kits are available from your local RV dealer, autoparts store, or possible Walmart. The insulation is gone and even though they are taped, they will be nothing but a headache from now on. Water intrusion from rain or puddle splashes could get in and short the wires again.
This is actually the very first thing you should do.
Here is the picture of the 4 pin/7 pin trailer light tester.
