Apr 30, 2025 · 2025 F-250 Upfitter Switch Wiring Location - Ford Truck Enthusiasts Forums 2023+ Super Duty - 2025 F-250 Upfitter Switch Wiring Location - Does anyone have any information on the …

The Ford Upfitter Switches are optional overhead console mount switches (Option Code 66S) that control underhood mounted relays. (Reference the Upfitter Relay Box section of this BBLB).

Apr 15, 2025 · Hey, I am finishing a AUX fuel tank install and I wanted to use a electric cut off valve to control it (there is a manual one installed for a back up). I went to just tap into the factory upfitter …

Jun 7, 2024 · The light is still on for the #3 upfitter switch. I have tried moving the ground wire to a different ground point and also switched out the #3 relay with the #4 relay in the upfitter fuse box with …

May 20, 2024 · I am installing a picker and service body on a 2024 F550 and curious if anyone has the wiring diagram for the rear of these trucks. The wiring is quite different than the '19 the deck and …

Dec 31, 2017 · After looking through this area of the forums, I couldn't find where the wires for the upfitter switches were. In searching Youtube, I found a couple of videos that will help others looking …

The Ford Upfitter Switches are optional overhead console mount switches (Option Code 66S) that control under hood mounted relays. These relays power six blunt cut wires that are taped on a …

Aug 26, 2010 · Upfitter switch wire location Jump to Latest 26K views 24 replies 11 participants last post by Ed of the North Nov 16, 2011 Powerstrokingmypp Discussion starter

Sep 20, 2016 · The wires for the upfitter switches are taped to the main wiring harness that goes through the first wall on the driver's side. There is no option to use just the switch without using the relays.

Feb 9, 2012 · 1st thing to find is the upfitter power wires, they are above and left of the steering column, mine were actually taped on top of the harness and could not be seen by just looking up from the …