ESOF working occasionally??
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ESOF working occasionally??
HI everyone, I'm looking for some help with my 2002 Superduty 7.3 ESOF. I used 4x4 last week and the transfer case engaged and disengaged great. Yesterday I tried and got no response. I got home, checked the 2 relays by the brake booster and checked the fuses related to the ESOF system. Those check out good. I ohm checked the position switch on dash(2wd, 4x4 hi, 4x4 low) and it passed. I bench tested the electric shift motor and it works both directions just fine. I also jumped the relays and the transfer case shifted to 4x4 hi and low fine and the cluster indicator lights light up properly. Put everything back together, took a lil break and tried it again with key on truck off (so I can hear the transfercase) Went in and out both HI and LOW great about 4 to 5 times then got stuck in 4 LOW. I manually got it out by jumping the relays again. Tried again today. It went into 4x4 HI great, put in neutral brake on and went into 4x4 LOW great. But it will NOT come out of 4x4 LOW. Im stumped and don't want to just start throwing parts at it. Any advice/direction would be greatly appreciated!
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Joined: Nov 2004
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I don't have an answer for you, but I know that on my 2006 F350 5.4l, sometimes it just takes awhile for it to disengage from 4lo. I recall one time sitting for a few minutes (it seemed), all the while thinking "great - now what am I going to do". I've used 4lo probably less than ten times - just in really heavy deep snow when plowing.
Just last week I put my 2011 F350 into 4lo just to "exercise" it during the summer months - made all sorts of grinding noises disengaging.
So.....that just may be normal operation for the 4lo
Just last week I put my 2011 F350 into 4lo just to "exercise" it during the summer months - made all sorts of grinding noises disengaging.
So.....that just may be normal operation for the 4lo
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Jjw1993
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 24, 2018 07:22 PM
