4x4 issue - dash lights won't even come on - Ford Powerstroke Diesel Forum
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Old 02-12-2014, 07:08 PM
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4x4 issue - dash lights won't even come on

2004 F250 King Ranch with 6.0 and turn knob 4wd - manual hubs
4wd lights activate when cranking the truck but will not come on when I try to use 4wd and 4wd isn't working. Any and all advice would help bc we are getting a lot of ice right now and I can't sit in this house much longer! Lol. Thanks!
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Old 02-12-2014, 07:10 PM
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start with fuses and relays under the hood.
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Old 02-12-2014, 07:31 PM
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Checked all 4wd related fuses under dash. Gotta figure out where all other relays etc are on the truck and what they look like and what to look for. I'm far from being a mechanic - just tryin to learn as I go! I hope I can get this thing by myself so I don't have to put it in the shop
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Old 02-12-2014, 07:48 PM
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There are two ESOF relays in their own box, driver side fender mounted, right next to the brake reservoir.
Often times they are mounted upside down and the lid fills up with water damages the relays.
One shifts the transfer case into 4x4, the other shifts it out.
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Old 02-12-2014, 07:51 PM
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Quote:
Originally Posted by Heavy_GD View Post
There are two ESOF relays in their own box, driver side fender mounted, right next to the brake reservoir.
Often times they are mounted upside down and the lid fills up with water damages the relays.
One shifts the transfer case into 4x4, the other shifts it out.

Exactly, mine were mounted correctly but were still failed, I believe low gets power from 4 HI so if one relay fails both will not function.
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Old 02-12-2014, 08:03 PM
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Oreillys has a part listed for my truck called the 4wd actuator. Where is that located and could that also be the problem? Planning to check possibilities tomorrow
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Old 02-12-2014, 08:39 PM
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Oreillys has a part listed for my truck called the 4wd actuator. Where is that located and could that also be the problem? Planning to check possibilities tomorrow
That's the transfer case motor itself bolter to the t-case. I would go look at those relays before you go buying a new actuator.
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Old 02-12-2014, 08:41 PM
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Also just incase you did not know, 4 Lo will not engage unless the truck is in neutral, 4 Hi should be able to be engaged "on the fly".
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Old 02-13-2014, 03:17 PM
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It was the relays. 20 bucks and 2 minutes and I was good to go. Thanks guys! Got me out of the house in all this snow and ice
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Old 02-13-2014, 03:43 PM
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Good deal, thanks for circling back
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