Why?
I'm trying to help you out here. I got about 15 years in an FJ 62, use me as a resource.
My FJ62 feels likes it’s 1 wheel drive out at Cape Lookout (1 Viewer)
- Thread starter TheElegantFox
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I'm trying to help you out here. I got about 15 years in an FJ 62, use me as a resource.
- Thread starter
- #22
Ah ok. If this repair is simple enough I can take it on. Are the vacuum lines diagramed in the Hanes repair manual?
Maybe?
But they are under your truck, just about even with the passenger side B pillar....
Here.
4wd not engaging 1988 fj62
Ok, I have read every post on this topic and I still can't get my 4wd to engage. So here is what I have so far: 1. With Hubs unlocked with 4wd button pressed in (no green light by the way) engine running, driveshaft spins easily by hand. This is BOTH in 2wd high AND 4wd low. On the firewall...
forum.ih8mud.com
Yes, this is a simple repair, with some guidance I am sure you can do it!. Your transfer case is not broken!
When you post up asking for advice, you have to listen to what the guys are telling you
@Pacer is the man, and from the sounds of it (4WD light not coming on) he's right on the money. The 4wd light comes on when the shift fork for 2wd/4wd moves into the 4wd position, and since this is actuated by vacuum on FJ62s, that's what the issue is.
s***, if you have a mityvac or other way of producing vacuum, you can connect it to the 4wd shift diaphragm to prove to you that's what the issue is.
EDIT: also, in that OBX guidance thread you had, I guess we should have said "make sure your 4wd works"
- Thread starter
- #26
Yeah, I'm taking the advice here and giving the truck a once over.
I saw that you have the traction boards, can't tell the brand. Did you get to use them when stuck? Those can be useless in mud, but pretty much designed for sand.
- Thread starter
- #28
Is this the section where the vacuum lines would be? Trying to piece it together from that linked post
- Thread starter
- #29
This looks like the case itself. I guess it goes to hard lines at some point?
Switch those two line. If the light comes on there is a part number in the forum for a mini truck relay.
Or you can do it under the truck at the transfer case, same effect.
Switch the hoses and start the truck, it should slip into four-wheel drive all by itself, green light should illuminate.
Simply switch the hoses back and it should pull itself back into two-wheel drive.
You're on the right track
- Thread starter
- #32
Just swapped the lower two hoses closest to the transfer case, no change in behavior and no green 4x4 light. Does that mean the lines could be bad and there’s no vacuum?
Great, now we can move forward.
Again, if you have the time I'm happy to talk you through it on the phone.
Did you start the truck, maybe put it in drive and let it roll forward a few feet once the lines are swapped?
Let me know....
- Thread starter
- #34
Yeah, did a short jaunt around the block to see if it maybe had hooked up but the light was still off. Didn’t hear or feel anything from the front diff.
- Thread starter
- #35
Update on the findings. The engine bay VSVs are getting a vacuum feed to them. The hoses at the transfer case only get a vacuum feed on the top tube (transfer switch off has no vacuum feed to the lines).
Strange findings about the hubs, drivers rotates when set to lock and vehicle moves. Passengers does not move when locked. When unlocked it seems the inverse is true, drivers doesn’t move, passengers does.
Also the passengers side hub requires a wrench to turn, drivers can hand turn.
Strange findings about the hubs, drivers rotates when set to lock and vehicle moves. Passengers does not move when locked. When unlocked it seems the inverse is true, drivers doesn’t move, passengers does.
Also the passengers side hub requires a wrench to turn, drivers can hand turn.
- Thread starter
- #38
To update the thread from the text chain on the side, the driveshaft doesn’t rotate by hand when locked.
- Thread starter
- #39
Could it be I’m missing a relay? I’ll have to find a chart that pinpoints the correct relay to check.
- Thread starter
- #40
So what Pacer and I have figured out is that the passenger side hub does not engage at all and will need to be serviced.
The blue VSV produces a vacuum feed, the red is dead. Swapping these to send a positive feed to the transfer case does not engage the front driveshaft. So far no combination has engaged or locked the front driveshaft.
The blue VSV produces a vacuum feed, the red is dead. Swapping these to send a positive feed to the transfer case does not engage the front driveshaft. So far no combination has engaged or locked the front driveshaft.
