The problems might be related. I would first replace that burned out bulb, and if the problem is not fixed, use a circuit tester, like part # PTW2993, and check each pin on your connector while that function is activated. (For example, pin for yellow wire-left turn signal, pin for green wire-right turn signal, pin for brown wire-running lights.) You might also use that tester and check your converter to make sure it's working as it should. Make sure there is signal going in one side of... view full answer...
It sounds like the wiring harness # C56175 input wires are not connected to the correct tail light wires on your 1994 Ford Aerostar. You will need to make sure and test the tail light wiring for the correct functions. You would need to use a circuit tester such as # PTW2991 to test and verify the functions of the vehicle wiring and then splice in the trailer wiring harness accordingly.
On the harness there is a white wire that should be grounded to a clean metal surface. The green wire... view full answer...
If you are using an aftermarket connecter, when the trailer connector was installed a tail light converter might not have been used. If this is the case, you will not be getting the signal for the brake lamps. This would explain the issue you are having. If this is an OEM trailer connector, typically the towing circuits are protected by fuses located in the engine compartment. Check the fuses and replace if needed.
Trailer tail lights have the brake lamp and the turn signal combined onto... view full answer...
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