Compression Ignition Addict
Join Date: Mar 2008
Location: Santa Rosa, CA
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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.
There is also a relay in the inside fusebox that is an Upfitter control relay, this would be a good place to check first because it is supposed to get power when the ignition is on.
2005 F-250 CC/SB 4x4 medium wedgewood blue
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5" lift, 5" Donahoe rear springs, 35x13.50 MTZ's, 18x12 Fuel Hostage wheels, 4.30 gears, Banks 4" exhaust, Airraid intake, SCT from Innovative, ARP headstuds, Bulletproof ficm, Scangauge II, Randy Ellis Design lightbar, Street Scene flares, Harpoon mod, Zoodad mod, LED 2010 taillights, Switchback LED front turn signals