I have a Ford F 250 diesel that wont go in 4wd. Vacuum pump is OK, fuse is ok, relay switches are ok, and the transfer case motor is OK. new Hubs. Thinking it's dash switch. 4wd light won't come on.
3 wires go to switch. One has power, then when I check on of the other when I switch to 4 hi or low no power goes out. Just want to be sure because I can't get my money back if it's not it
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