No Power to Left Turn Signal at Hitch

[tbussche]

I have a 1999 Newmar Mt. Aire and have lost the power to the left turn signal at the Tow Harness. The signal works fine on the motorhome. All of the other connections have power at the hitch harness. I took the 7 pin connector apart and checked all of the connections, all were good. I traced the "red" wire back to the gas tank area where it connected into the Ford wiring harness. I took this connector apart and also used some electrical contact cleaner on it. I spent all afternoon on this problem and still have no left turn signal power to my towed.

It appears that the signal lights on the motorhome uses a different set of wires than those going to the hitch harness.

Can anyone provide me with any additional information as to additional locations to check for power to the signal?

Thanks for any good suggestions.

[John Hilley]

Take a look at this F Series Trailer Tow Tap Schematic

[Izzyblueye]

Quote:

Originally Posted by tbussche I have a 1999 Newmar Mt. Aire and have lost the power to the left turn signal at the Tow Harness. The signal works fine on the motorhome. All of the other connections have power at the hitch harness. I took the 7 pin connector apart and checked all of the connections, all were good. I traced the "red" wire back to the gas tank area where it connected into the Ford wiring harness. I took this connector apart and also used some electrical contact cleaner on it. I spent all afternoon on this problem and still have no left turn signal power to my towed. It appears that the signal lights on the motorhome uses a different set of wires than those going to the hitch harness. Can anyone provide me with any additional information as to additional locations to check for power to the signal? Thanks for any good suggestions.

Have you tried a test light on the bulb socket. Also try a manual ground to the socket that is not working.

[tbussche]

All of the lights on the motorhome and the toad are good and in working order.

I have used both a volt ohm meter and a circuit tester. I have traced and tested back to the connector which is located in front of the gastank on my unit.

Does anyone know if there is a separate fuse for the trailer tow wiring and a separate fuse for the motorhome's turn signals?

Tom Van de Bussche

[Izzyblueye]

Quote:

Originally Posted by tbussche All of the lights on the motorhome and the toad are good and in working order. I have used both a volt ohm meter and a circuit tester. I have traced and tested back to the connector which is located in front of the gastank on my unit. Does anyone know if there is a separate fuse for the trailer tow wiring and a separate fuse for the motorhome's turn signals? Tom Van de Bussche

Yes my E-450 super duty has a separate fuse out under the hood for the tow wiring. I think mine is #24. Just went through this last week. However, since you have power to the other functions that probably is not your answer. When my tow wiring fuse blew, I had nothing on any pin.

[Jimary]

When I bought mine some of the fuses were blown for the trailer connector. If I remember right there are seperate fuses for LT, RT, Tail, & Brake lights, and are located in the fuse box under the dash on the left. Your Ford owners manual will have a diagram showing there locations.

[tbussche]

Thanks to everyone that replied. I found the problem, thanks to JIMARY. There is a separate fuse box under the dashboard to the left of the steering column. I pulled the 10 amp fuse that the owners manual said was for the left trailer turn signal and it was blown. Replaced the fuse and now once again I have a left turn signal on the toad when attached to the motorhome.

Now I can once again make left hand turns with peace of mind.

[Mikeeg]

God bless you for being able to see and work on that fuse box,it is like working with fish hooks for fingers. Great Job!!!!!!!!!!!!