upfitter switch question
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upfitter switch question
I understand the wires for the upfitter switches are under the dash, near the steering column. If I want to use them to control something on the outside of the truck... fog lights, bed lights........ is there also wire access in the engine compartment? or do I have to drill a hole in something to get wires outside?
2008 F250 XLT 4x4
2008 F250 XLT 4x4
Last edited by Streetmedik; Oct 23, 2018 at 08:22 PM. Reason: added what truck i have
Post Fiend
Joined: Nov 2001
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From: Tallassee, ALabama
In the harness that passes through the firewall...under the hood beneath the master cylinder where the harness come through the firewall.......then inside on the left side of the steering column where the harness passes through the fire wall...
see page 4 of this to get idea of local
https://madocumentupload.marketingas...b525f&v5=False
see page 4 of this to get idea of local
https://madocumentupload.marketingas...b525f&v5=False
Posting Guru
Joined: Oct 2013
Posts: 1,039
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From: NC
If you don't want to go through the firewall, it's easier to come up through the floorboard drain holes and head directly to the upfitter wires. Then you don't have to mess around with those short wires.
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Joined: Sep 2016
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Upfitter switches have different power ratings.. I read each also has its own relay control.
https://www.ford-trucks.com/forums/1464817-upfitter-switch-power-wires.html
There seems to be a difference in switch ID's and power ratings. Please check/confirm for your year and model.
Aux-1 Circuit No 1936 wire color: Orange/Lt. Green [30amp]
Aux-2 Circuit No 1933 wire color: Orange [30amp]
Aux-3 Circuit No 1934 wire color: Orange/Yellow [10amp]
Aux-4 Circuit No 1935 wire color: Orange/Lt. Blue [10amp]
Newer Ford Super Duty trucks have additional switches.
You may want to confirm with your truck model and year.
https://puredieselpower.com/Tech/For...erSwitches.htm
https://www.ford-trucks.com/forums/1464817-upfitter-switch-power-wires.html
There seems to be a difference in switch ID's and power ratings. Please check/confirm for your year and model.
Aux-1 Circuit No 1936 wire color: Orange/Lt. Green [30amp]
Aux-2 Circuit No 1933 wire color: Orange [30amp]
Aux-3 Circuit No 1934 wire color: Orange/Yellow [10amp]
Aux-4 Circuit No 1935 wire color: Orange/Lt. Blue [10amp]
Newer Ford Super Duty trucks have additional switches.
You may want to confirm with your truck model and year.
https://puredieselpower.com/Tech/For...erSwitches.htm
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Shortbox4x4
1973 - 1979 F-100 & Larger F-Series Trucks
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May 25, 2016 08:09 PM
