Boat Trailer Wiring Diagram For Trailer Lights. If the lights on the tester function properly the problem is the trailer lights or harness and you need to some trailer lights troubleshooting. Clean the connector photo step 2 below and check again. So here i have an older trailer which needed some work along with re wiring the lights.
So here i have an older trailer which needed some work along with re wiring the lights. This is a fairly simple setup no license plate light or clearance lights. Clean the connector photo step 2 below and check again. The second which is the most common problem is a weak ground in the system.
4 way flat trailer wiring diagram pics.
If the lights on the tester function properly the problem is the trailer lights or harness and you need to some trailer lights troubleshooting. Large 5th wheel trailers. If you still have problems make an appointment to have the wiring checked. Notice the four prong connector on my boat trailer has 5 wires coming out the bottom. Should i unplug my boat trailer when i back my boat into the water.