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Upfitter switches
The wires aren’t hooked to anything on either end, they’re just a convenient set of wires pre-ran through the firewall. You’ll hook your external positive wire to one of the wires (whichever color you want) under the hood, then run that same color wire your found under the dash to whichever...- IHMCFirefighter
- Post #2
- Forum: General Super Duty Discussion
