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Re: running lights on trailer blowing fuses in my truck
If it only happens when the trailer is plugged in you have a short in the trailer. wiring or the bulbs have corrosion or water in the connetor. Same thing if the trailer is unplugged. Check the truck lights
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The location of the fuse for the running lights on a trailer may vary depending on the make and model of your vehicle. However, here are some general steps to help you locate the fuse:
Check your vehicle's owner's manual to determine the location of the fuse box. The manual should also provide a diagram of the fuse box and a list of fuses and their functions.
Once you have located the fuse box, open it and look for the fuse labeled "Trailer" or "Trailer Lights." Some vehicles may have a separate fuse box specifically for trailer wiring.
If you cannot find a fuse labeled for the trailer lights, check the fuses labeled "Parking Lights" or "Tail Lights." These fuses may also control the trailer's running lights.
If you are unable to find the correct fuse, you may need to consult a mechanic or the dealership for assistance.
Remember to always replace a blown fuse with one of the same amperage rating. If the new fuse blows immediately after installation, there may be a wiring issue with the trailer or vehicle that needs to be addressed.
The trailer light are connected to you vehicles wiring. Turn brake running. If the tail light are on on your vehicle you start checking wiring. If the tail lamps do not work check fuses in vehicle. If the trailer is hooked up and the fuse blows again check trailer. If it blows agin without trailer check vehicle wiring.
The fuses for the trailer tow adapter are in the normal fuse panels.
Engine Compartment fuse panel 101 - Is the battery charge circuit ( hot in run position ) 20 - Left Stop / Turn fuse 19 - Right Stop / Turn 5 - Trailer tow reversing lamps & Trailer Tow parking lamps
Cab Fuse Panel 23 - fuse for the relay for the trailer tow battery charge circuit
All of these are in the owners manual
If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford : https://www.fleet.ford.com/maintenance/owners_manuals/default.asp
Did you check the fuse for the trailer tow adapter paring lamps ? This is a separate fuse powered by a relay, it is not the same circuit as the truck's parking lamps. This is fuse # F10 & The half size ISO relay, R201 in the fuse panel in the passenger side kick panel. This is based upon being a new body style 2004, not the 2004 Heritage or Lightning models, those are different fuse & relay locations.
There is a fase under the hood marked trailer tail lights,it is a 15amp fuse and if continues to blow ther is a problem in the trailer wireing or the plug on the trailer.
The truck is protecting itself from the load impose by the trailer.. Chk the plug on the truck for wire gauge size. Turn any electrical loads off on the trailer, any and all. If fuse still blows then the fuse is either underated or the trailer has a dead short. In fact turn trail main power panel of. All lights work you say. So ck the inverter for defect byturning off the inverter on one of the trailers.
fix the plug,car or trailer, and check the wiring and bulb sockets in the trailer
bigger fuses are equal to burnt wiring harness or fires in either vehicle
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