No 4x4, What plugs into the switch? - Ford Powerstroke Diesel Forum
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Old 01-31-2014, 02:41 PM
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No 4x4, What plugs into the switch?

Hi everybody,

I have a 2000 F250 7.3L with the ESOF switch and the auto/manual locking hubs. When I flip the switch, nothing happens. No clicking, no shifting, no 4x4 light on the dash, no nothing. The switch isn't illuminated either, not exactly sure if it's supposed to be. When I took the switch out nothing was plugged into it, so I located the small rectangular wiring harness that clips into the back of it and still nothing. Tried manually locking the hubs and that didn't work either. Fuses and relays look okay as far as I can tell. I haven't tested the shift motor on the T-Case yet but all plugs look good and I cleaned them with electrical cleaner. Don't think it's the GEM either, I haven't had any other electrical problems except the passenger power door lock doesn't work. My question is, there is a small circular plug on the back of the switch separate from the rectangular wiring harness. Is this supposed to be where a ground wire plugs in or? It's currently empty, tried looking behind the dash for a wire that would plug into it and I can't find anything. If someone wouldn't mind taking their switch out and seeing what exactly plugs into the back of it, I'd greatly appreciate it. Just bought the truck and previous owner swears the 4x4 worked when he sold it to me. Thanks in advance!
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Old 01-31-2014, 02:54 PM
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you should here a noise at the t case
i wonder why the switch was unplugged ? guessing it may be bad and somone was going to replace it until they changed their mind and snapped it back in ?

check fuses /relays first IMHO
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Old 01-31-2014, 03:04 PM
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Yeah for sure, there's no noise of the t-case shifting or anything. And yeah, definitely weird that it wasn't plugged in. You may be right, perhaps the switch was bad in the first place. I'm just curious as to what exactly plugs into the back of the switch. There's the small rectangular wiring harness that has I think 4 different colored wires going to it, but is there anything else that's supposed to go to the switch as well? I've been trying to find some wiring diagrams but no luck yet. Thanks for the reply!
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