I just printed that. Wow..complicated. I will check stuff and get back with you. Thanks.
Brian,
Actually, its not all that complicated in terms of what you need to know.
After reading "StreetRods" post I realized I had not really researched the issue like I should have. In any case, consider this, if my 2004 Sport Trac is wired up anything like your Mountaineer...
As discussed, both the trailer
left turn/stop (fuse F2.7) and
right turn/stop (fuse F2.3) lamps receive 12V+ from a different source than your trailer tail lights (fuse f1.23).
Your trailer taillights receive 12V+ from a relay in the "Battery Junction Box (F1)" (under the hood).
In my case, the circuit that passes through that relay is fused at station F1.23 (15a). Apparently, its fuse '30' for StreetRodder.
So all you really need to do (hopefully) is replace a burned out fuse at F1.23 (or 30).
While I found it more than just a little confusing to ferret out how this works (nowhere in my manual is there a reference to "Trailer tow tail lights"), only "Trailer Tow"), it all actually makes sense.
When a trailer is hooked up Ford assumed there would just be one more lamp in each stop/turn circuit. That 7.5a fuse can easily handle the extra lamp.
But they have no way of knowing how many more lamps are going to be in the 'tail light' circuit (i.e numerous side clearance lamps, the longer the trailer, the more lamps). So they include a relay in the circuit that can handle 15 amps. Now you indicated that automotive electrics is not your strong suite but just know this... including a relay (F1.47a) in a circuit like this allows
the controlling switch to close the 15 amp circuit by passing just a fraction of an amp (to energize the small electromagnetic coil in the relay) through that switch. (Passing a lot of amps through a switch is what burns them out).
The timing of you post worked well for me. I am currently getting my Sport Trac setup for towing. Knowing exactly where that "Tow tail light" fuse is just might come in handy some dark and stormy night.
Oh yea, please don't go cutting and spicing wires... get it working the way it is supposed to work. Anything else turns newer cars into older cars.