Fantastic Troubleshooting Boat Trailer Lights

If you have a power converter or a t connector disconnect the trailer and use a circuit tester to check whether a signal is going into and back from the converter or modulite box on the appropriate wires.

Troubleshooting boat trailer lights. If the bulbs are not the problem disconnect the trailer s wiring system from the tow vehicle. The best way to solve your trailer lights wiring issue is to eliminate possible problems one by one until you have pinpointed the root cause of the malfunction. You may have a ground problem.

Remove the bulb then clean the electrical connector behind the bulb with fine grit sandpaper or wet dry paper and install a new bulb. If the tester. Find the ground screw on the boat trailer it is almost always a white wire.

Actually grounding problems are the cause of many boat trailer lighting problems and it is a simple issue to fix. First disconnect the harness and plug a tester photo into the receptacle from your vehicle. So check the lights.

Disconnect it clean the ground strap with fine sandpaper spray with electronic contact cleaner and apply some dielectric grease to create a good contact. Hook up your trailer and connect the trailer light harness. Test all of the lights from the backup lights to the turn signals and brake lights to ensure the problem is not the tow vehicle itself.

If all the lights appear dim or you have no lights at all check the trailer light harness at the tow vehicle. For trailers fitted with conventional incandescent light fittings remove the lens covers and check the bulbs to make sure none are burned out. When troubleshooting trailer light problems disconnect the trailer tongue and safety chains from the tow vehicle to ensure that the grounding is through the connected wires only.

First start with the simple things. It is possible that one of the bulbs on your trailer burned out. Have a helper stand back to see if the running lights stoplights and blinkers are working properly.