Why won't your trailer turn signals work on a ford f350?

Answer 1

if they come on but wont flash replace flasher module in fuse box if no they don't come on at all check fuse

This is the simple answer but if they still don't work u know you have power and good bulbs try this feel behind the flash module that's in the fuse block u will probably find an additional flash module this one is used for the 4 ways/ts also the switch is mounted so that it catches dust clean the 4way switch with q tip so that it moves freely and doesnt stick hope it helps save u some time

Answer 2

I found just a few weeks ago, that the trailer plug gets power from the respective rear lamps. In other words, if the bulb on the back of the pick up is burnt out, or if the enternal wires on the wedge type lamp is faulty, it won't complete the circuit to the trailer plug. Check this out.

Answer 3

The failure of blinkers (also same lights as turn signals) can be basically diagnosed through three initial steps. If these fail to isolate the cause more comprehensive electrical diagnosis may be needed. The first steps involves checking for burnt out bulbs and socket issues. The next should be checking the fuses and relays. The third can be switch issue or possibly more needing more comprehensive service.

Answer 4

Could be any number of possibilities:

* burned out bulbs * blown fuse * corroded terminals * corroded sockets * broken or shorted wire * turn indicator switch failure