Hi, I actually ended up taking it to Ford. That was Monday. They worked on it for six hours. The fuse kept shorting, they put in a new mirror switch. They said they really couldn't find the problem but did get it to work. It is now Wednesday and it is not working again. I brought it back to them and they will be happy to look at it again for another $84.00 an hour! Help!!!
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This is a very common failure, depending on the year of your truck. Check the fuse panel under the hood VERY CLOSELY and make sure there is no corrosion AT ALL, and that each and every fuse/relay is seated nice and tight and in the correct spot. Pay close attention to fuse #23 and the surrounding areas as that is usually part of the problem. Further more, the wiring up to this panel needs to be traced back, and i believe that there's a loom that goes through the firewall and can be exposed/rubbed/chaffed/ in the driver side wheel well, especially if there is aftermarket or bigger wheels installed. finally, any malfunction indicator lights? any fault codes? how long has this been happening? and has it continued to get worse. Please Advise, we are here to help.
There are 2 fuses associated with the power mirrors, fuses F4 & F3.
The next thing to check ( if equiped ) do the power seats still work ? The reason I ask, is if the power seats do not work, this ( usually ) is a broken splice in the driver's side door sill. The broken wire also has other items associated with it.
Start with checking the fuses, and if they are good check for power at the power mirror switch on the : F3 - Orange w/ Light Green stripe wire. F4 is for the power fold module ( in 06 a King Ranch option ).
If you have the memory seats, there are 2 fuses to check, Fuse #3 and Fuse # 109 or 108 ( drivers or pass ). 108 & 109 are for the non memory seat version ( the driver's side seat has the 1 & 2 buttons on it, on the side ).
If both of these check OK, there are 2 routes. 1. Check for power at the power seat module 1.1. Fuse #3 = pin #1, Orange w/ light green stripe wire. 1.2. Fuse # 109 = pin #1 ( on the other connector ) Dark Green wire. Both are hot at all times, key position does not matter.
The non memory seat version is just fuse #109, Dark green.
Route #2 is some times there is a water leak in the driver's side door sill. There is a wire that is spliced ( 1 in, 2 out ) that can corrode and break. If this happens, there are usually other symptoms ( open door will not shut of radio, power mirrors don't work, etc ).
Lacking other symptoms, Focus on those 2 fuses, and making sure power is under the seat at the connector.
most likely a pinched wire around the seat causing a short to the seat frame every once in a while when the seat is in the right place. start with checking stuff that moves most often (driver's memory seat)
sounds like a bad fuse, have a look at your manual and see which fuse controls those parts, they are most likely on the same fuse, the fuse box may also say which fuse is for what, If the fuse in the first box doesn't fix it, try a new fuse in the box under the hood, let me know how this goes, you may also have corrosion in a wire but check the fuses first.