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Troubleshooting the 2003 Ford F-350 7.3L Trailer Left and Right Turn Signals & Running Lights Fuses  

Question:

hi where is the fuse located I do not have a fuse box under hood but I do have relay which one out of the three is it? Thanks 2003 f350 7.3l trailer left and right turns signals not working as well as running lights not workin

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Expert Reply:

The fuse panel is located below and to the left of the steering wheel by the brake pedal. Here are the trailer fuses and relays based on the owner's manual:

6 20A* Trailer tow turn/stop relay
38 20A* Trailer tow park lamps
39 15A* Trailer tow back-up lamps
101 30A** Trailer tow electric brake
115 20A** Trailer tow battery charge
305 — Trailer tow battery charge relay

I recommend using a circuit tester like # PTW2993 to test your wiring if replacing fuses and relays doesn't solve your issue.

expert reply by:
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Jason S

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