Hello all.  I have a wiring question concerning a 2002 F250 Ford, Diesel.  I had posted that I had a fuse blown pulling my trailer Labor Day weekend.  Well, it did it again yesterday.  We had gone to pick up a QH and when we left the place, we hadn't pushed the button on the shift to take the truck out of overdrive.  The truck blew the same 10 AMP fuse!  We had no throttle nor dash instruments.  We replaced the fuse and went on...no more problems.  So I thought back to the other time it did it and I do believe that the same thing happened to me.  I can push the button when in park with no problems, but if I have the truck in ANY gear, then Bloop! there goes the fuse.  I thought I would ask here before taking the truck to a dealership, got charged several hundereds of dollars and get told there is nothing wrong or that they can't find anything wrong.  I am no mechanic, nor am I an electrician, but it sounds to me like a short in the wiring on the towing package.  Any suggestions or advice? 

Thank you!

Reg,  I haven't tried it yet.  I think I will.  I have only had this trailer for a few months and never had this happen before with any other trailer.....  Do you think it possible that it could be in the wiring from the trailer?  I have experienced a few fuses blown within the trailer.

The only thing not factory is the brake box in the cab of my truck.  I had it installed after I bought the truck. Should I start tracing the wires there?

tncwgrl, the first thing I'd do is take the truck/trailer to an experienced and competent trailer repair center. Tell them the problem and ask them to test the connection on the truck at the plug and do the same on the trailer at the plug. If they have a "solid state/l.e.d." box they plug into your truck, it might show a problem. If not, the next thing I'd do, is ask them to jack up the back of the truck and simulate driving the truck, shifting gears and pushing the button on the gearshifter. This might show a problem, might not. I agree with another post, this could be a truck problem. The dealer is going to stand around, scratch their heads, then their butt, throw their hands in the air, do some simple diagnostic by plugging into the truck computer to check for codes and tell you the truck is fine, it's the trailer and you owe me a lot of money for all the scratching I did in the last hour or so.

I hope you find the problem. We had a problem with our 2001 Super Duty and it took six months to find and fix it. Happy trails.

Hello all.  Thought I would give you an update on my 'shorting out' problem.  I took some advice here and tried to re-create the problem with and without trailer hooked to truck.  Seems everytime I pushed the button on my shift to take overdrive off, it blew a fuse that controlled dash instruments and throttle.  Here is the answer.  The wires running from the button on the shift run over top of the shift and every time you shift gears it pulled on the wires. Hence, a short.  I contacted a guy in Lewisburg TN that mainly works on Fords and he advised me to go ahead and replace the whole shift.  He said that you COULD fix the current problem by repairing the wiring, but in his experience, it just opened a whole 'nother can of worms and other problems down the road.  I am able to get shifter replace for $100 or less.   So thanks to all for your suggestions/advice! Keep up the good work!