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Join Date: Apr 2010
Location: Clinton, MS
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Do you mean you are the original owner and requested the upfitter switches with specific functions like high idle, off-road lights, air compressor, etc.? And these functions have always been disabled by the activation of the automatic window lock feature? Does the "original window sticker" indicate your upfitter switch functions?
I am very confused by the limited information provided for this malfunction. The upfitter switches are not all routed through the same fuse - or even the same size fuse - in the fuse block. Activation of the window lock feature disabling the switches almost exclusively indicates a short (not necessarily at the fuse block of course).
The owner's manual has a fuse block diagram (mine is page 218). Here is what my owner's manual indicates:
Upfitter Switch 1 = 30A fuse, block #108
Upfitter Switch 2 = 30A fuse, block #109
Upfitter Switch 3 = 10A fuse, block #3
Upfitter Switch 4 = 10A fuse, block #5
Door locks = 30A fuse, block #102
Power Windows = 30A fuse, block #601 (this is a larger sized fuse and lies between the upfitter switch fuses and the door lock fuse)
I provide this information to assist you in the tedious process of wire tracing and continuity checks. That is really the only way to determine the source of your electrical malfunction.
Jonathan D. Howell
Lieutenant Colonel, U.S. Army
2005 EarthRoamer XV-LT (Ford F550)
"Americans Travelling America"