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i have a 2005 f250 super crew 6.0L
i am trying to hook up my sliptank pump and a plug in for my cell phone booster to the upfitter switches i have found the four wires behind the fuse pannle but i cant find the other wire my knowledge with electrical theres always a +/- so two wiers i can only find the ones behind the cjb any help guys
There is only one wire from the switches. Just use a ground to the cab/chassis - wherever you find a place which makes a good ground point. The wires from the upfitter switches are just power on/off. Upfitter Switches 1 and 2 have a higher fused amperage with larger gauge wires. I have used these switches for accessories before and I also use one as a high idle too.