Upfitter switches stopped working - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 09-25-2012, 06:52 PM Thread Starter
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Upfitter switches stopped working

I have an 09 f350, I have 4 kc lights running off Upfitter #4, last night they worked fine, I stopped for fuel and when I got back on the road they wouldn't work. None of the other switches had power, I went out this morning and checked the wiring for a short and checked fuses, turned the switches on and they worked. Now none of the switches have power....I'm not sure what to think?
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post #2 of 3 Old 09-26-2012, 10:23 AM
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maybe a bad ground!!!
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post #3 of 3 Old 09-26-2012, 03:34 PM
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There is also a relay in your dashboard fusebox that powers the upfitter switches, look in your owners manual to find which relay it is. If it is going bad then you would have those same symtoms.

EDIT: Sorry, the 2008 and newer upfitters don't have a relay in the fusebox, only the 2005-2007 do.

Here is the wiring info for both styles of upfitter switches, hopefully this will help you out: https://www.fleet.ford.com/TRUCKBBAS/non-html/Q117.pdf

2005 F-250 CC/SB 4x4 medium wedgewood blue

5" lift, 5" Donahoe rear springs, 35x13.50 Extreme A/T's, 18x10 Ultra Predator 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, dual color LED front turn signals, Pioneer avic-D3 with ipod and backup cams

Last edited by GregsSD; 09-26-2012 at 03:59 PM.
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