Switch Power Question
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Switch Power Question
Everyone...I have a question. My ESOF switch does not seem to work. Yesterday in the snow I turned the **** to 4x4 and nothing happened. Last year when I had my hub problem at least my 4x4 dash light came on even though my hubs didn't engage. My vacum pumps works and my vents all change fine.
Now I didn't even get my dash light on. So I stopped and tried the 4x4 LOW and nothing happened at all....nothing. About 3 weeks ago, I had used the 4x4 high and the had no problems at all.
I got the book out and found a fuse that was associated with the ESOF and the backup lights, etc. The backup lights are working so I don't think it is that fuse.
So that brings up my question.....what would it be then?
Now I didn't even get my dash light on. So I stopped and tried the 4x4 LOW and nothing happened at all....nothing. About 3 weeks ago, I had used the 4x4 high and the had no problems at all.
I got the book out and found a fuse that was associated with the ESOF and the backup lights, etc. The backup lights are working so I don't think it is that fuse.
So that brings up my question.....what would it be then?
Of the next Riffraff East
Joined: Oct 2004
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From: Concord NC
Check for power at the transfer shift motor for the transfer case. Should have power on it when dash switch is on. If not then you need to check fuses and relays. If yes, the your shift motor is bad.
You have a Power Distribution Box (fuse box) under the hood, drivers side, on fender well. It has a plastic cover over it. Fuse # 17 (30amp) is for the ESOF (4x4). There are also two relays under seperate small covers beside the PDB which holds the relays. There are 4 relays side by side. 2 are for the ESOF and 2 are for trailer tow battery charge. Either of the 2 for the ESOF go bad and motor want have power and you want have 4 wheel drive. They are #40 and 41.
You have a Power Distribution Box (fuse box) under the hood, drivers side, on fender well. It has a plastic cover over it. Fuse # 17 (30amp) is for the ESOF (4x4). There are also two relays under seperate small covers beside the PDB which holds the relays. There are 4 relays side by side. 2 are for the ESOF and 2 are for trailer tow battery charge. Either of the 2 for the ESOF go bad and motor want have power and you want have 4 wheel drive. They are #40 and 41.
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Originally Posted by zx250
Check for power at the transfer shift motor for the transfer case. Should have power on it when dash switch is on. If not then you need to check fuses and relays. If yes, the your shift motor is bad.
You have a Power Distribution Box (fuse box) under the hood, drivers side, on fender well. It has a plastic cover over it. Fuse # 17 (30amp) is for the ESOF (4x4). There are also two relays under seperate small covers beside the PDB which holds the relays. There are 4 relays side by side. 2 are for the ESOF and 2 are for trailer tow battery charge. Either of the 2 for the ESOF go bad and motor want have power and you want have 4 wheel drive. They are #40 and 41.
You have a Power Distribution Box (fuse box) under the hood, drivers side, on fender well. It has a plastic cover over it. Fuse # 17 (30amp) is for the ESOF (4x4). There are also two relays under seperate small covers beside the PDB which holds the relays. There are 4 relays side by side. 2 are for the ESOF and 2 are for trailer tow battery charge. Either of the 2 for the ESOF go bad and motor want have power and you want have 4 wheel drive. They are #40 and 41.
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UPDATE--> FInally got around to checking the truck. The fuse under the dash was checked and it good. The 30 fuse in the powerbox under the hood was checked and good.
Guess I should have asked how do you tell if a relay is bad or not? Found them and removed then, and put them back and not sure how to check them.
Guess I should have asked how do you tell if a relay is bad or not? Found them and removed then, and put them back and not sure how to check them.
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Of the next Riffraff East
Joined: Oct 2004
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From: Concord NC
There are two more under the other little plastic cover, swap them out with the ESOF ones and check if that fixed the problem. If not, chances are you have a bad shift motor or a bad place in the wiring. You can see the shift motor mounted on top of the transfer case. Unplug the wire and with the ESOF switch in the on position, check for power. If you have it, plug it back and see if it works, if not then it's motor time.
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I found both of those. One of the little boxes for lack of better explanation runs parralel with the truck and the other sits the other way looking side to side. Which ones are the ESOF ones? The ones I pulled out , looked at, and put back in were the ones that run parrallel with the truck closest to the windshield.
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Originally Posted by zx250
I'm really not sure which is which. Two are for ESOF and the others are for trailer tow stuff. So unless you are towing, it will be ok to drive.
Of the next Riffraff East
Joined: Oct 2004
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From: Concord NC
I wish I could remember which ones were which. You could also have someone turn the switch while you listen/feel the relays. If they are working, you should be able to tell, if you don't feel anything, then they are not working or you are not getting power to them.
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Update #2--> I swapped all 4 of them around two each to the other spot. I turned on the key and when I turned to swith to 4x4 I could hear a small motor turning on and off and on and off, etc from what sounded more like the drivers side of the truck. I know it was NOT the vacumm pump as I know its sound and where it is located. Was this motor the shift motor maybe?
None the less, 4x4 still did not engage and did not show up on the dash indicator.
Thoughts for the next step?
None the less, 4x4 still did not engage and did not show up on the dash indicator.
Thoughts for the next step?
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Joined: Feb 2007
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From: Bradenton FL
Same symptoms as mine, here was my solution a while back
https://www.ford-trucks.com/forums/6...xxxxxxxed.html
https://www.ford-trucks.com/forums/6...xxxxxxxed.html