4WD problems
Thread Starter
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4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
4WD problems
I’m back for some more help. It’s been a while since I was here.
2002 F350 Lariat, Four door long bed, 7.3 Power stroke, 4WD.
The four wheel drive has stopped working completely. Sorry for the long post.
What I’ve checked:
the fuses, 29, 30, 31, 32, no power at all. Neither side of the fuse.
Switch on the dash, no power on either one of the four wires. I get power on one wire if I turn the lights on.
Went under the hood, found two relays under the same cover on the driver’s side, swapped those around. No joy.
The 4WD light in the dash only lights when you first start the truck.
The transfer case case makes not a sound when you turn the esof switch.
Everything worked as it should a month ago. Now it doesn’t.
Any help where else to check would be appreciated. I’ll even settle for wild guesses.
Thanks, Joe
2002 F350 Lariat, Four door long bed, 7.3 Power stroke, 4WD.
The four wheel drive has stopped working completely. Sorry for the long post.
What I’ve checked:
the fuses, 29, 30, 31, 32, no power at all. Neither side of the fuse.
Switch on the dash, no power on either one of the four wires. I get power on one wire if I turn the lights on.
Went under the hood, found two relays under the same cover on the driver’s side, swapped those around. No joy.
The 4WD light in the dash only lights when you first start the truck.
The transfer case case makes not a sound when you turn the esof switch.
Everything worked as it should a month ago. Now it doesn’t.
Any help where else to check would be appreciated. I’ll even settle for wild guesses.
Thanks, Joe
Thread Starter
|
4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
I guess my next step will be to pull the fuse box out and see what’s back there. The above fuses are all dead no power to them. Maybe a jumper wire has corroded and not transferring the power over.
If anyone comes up with anything else to try I’m all ears.
When I get it fixed I’ll come back and let you know.
If anyone comes up with anything else to try I’m all ears.
When I get it fixed I’ll come back and let you know.
Lead Driver
Joined: Jun 2006
Posts: 5,635
Likes: 963
From: Near Yosemite CA
Mice... they like hot wires and chew them given the chance, lost one of my HID headlights a few yrs ago, bought a new bulb, rplc'd it, no light.. started looking, mice chewed through the hot. Needless to say I stopped feeding my cats for a few days until they brought me a present/remnants.
I would look under the fuse box, see if they got in there and had fun, and get an outside katten or 2
I would look under the fuse box, see if they got in there and had fun, and get an outside katten or 2
Lead Driver
Joined: Mar 2006
Posts: 6,255
Likes: 438
From: IL
Lost all power to my 03 F350 a few years back, I had to replace the fuse block under the dash. Water had gotten in and corroded the circuit board in the back of the block.
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Thread Starter
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4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
Mice... they like hot wires and chew them given the chance, lost one of my HID headlights a few yrs ago, bought a new bulb, rplc'd it, no light.. started looking, mice chewed through the hot. Needless to say I stopped feeding my cats for a few days until they brought me a present/remnants.
I would look under the fuse box, see if they got in there and had fun, and get an outside katten or 2
I would look under the fuse box, see if they got in there and had fun, and get an outside katten or 2
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Thread Starter
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4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
Pulled the fuse panel completely out. What a job. At least it’s just plug and play. Doesn’t look like there is any water damage. Pulled the back off and the board is clean and shiny. No signs of burnt spots either. I won’t pull the board out to look for breaks in the circuits. That’s way above my pay grade.
Lead Driver
Joined: Mar 2006
Posts: 6,255
Likes: 438
From: IL
Sounds like you're going to need the wiring schematics and a VM to start back tracing your lines for power....but IMO, if you have power going into your fuse block and only certain fuses are dead on both sides. You probably have a bad board in the block, but you're still going to have to investigate. Might be worth your time to just buy another fuse block and swap it to see if that's the problem.
https://www.ebay.com/sch/i.html?_nkw...EaAmqgEALw_wcB
https://www.ebay.com/sch/i.html?_nkw...EaAmqgEALw_wcB
Thread Starter
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4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
I think you may be right. Fuses 30, 31, 32, 46 & 47 are dead on the hot side. I may try to jump power over to those fuses and see if it helps anything before I spend more money on it.
Thanks for your help.
Thanks for your help.
Thread Starter
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4wd Low
Joined: Jul 2014
Posts: 13
Likes: 2
Well. I sure wouldn’t suggest jumping the fuse panel out. It causes all kind of funny things to happen.My advice, JUST DON’T DO IT.
Now for the good news. The fuses started working again. ?? I don’t know why.
The bad news, it didn’t help the 4WD
at all. No changes. I’m going to have to ponder this one some more.
Thanks for all the help and if anyone has any more suggestions please let me know.
Now for the good news. The fuses started working again. ?? I don’t know why.
The bad news, it didn’t help the 4WD
at all. No changes. I’m going to have to ponder this one some more.
Thanks for all the help and if anyone has any more suggestions please let me know.
