FJ62 - 1988 4WD Light stuck on

Submitted: Tuesday, Jun 27, 2006 at 22:57
ThreadID: 35352 Views:4058 Replies:5 FollowUps:6
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Hi Guys,

Asked everyone ages ago about my FJ62's 4WD light sticking on...

Well i tried a couple of things that you all suggested but still nothing :'(

Does anybody have any other ways of getting it off? I believe that its pnumatic switch? Any body know where the hose would run? Someone recommendd hitting my transfer case with a hammer...??

Can anybody please help as i believe my car is in 4WD constantly

Cheers

Justin
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Reply By: Footloose - Tuesday, Jun 27, 2006 at 23:15

Tuesday, Jun 27, 2006 at 23:15
Have you tried driving in reverse for a couple of metres ? Running through the gearbox a few times ? Changing from second low to 2nd high at low speed ? etc
AnswerID: 180746

Follow Up By: cipher - Tuesday, Jun 27, 2006 at 23:17

Tuesday, Jun 27, 2006 at 23:17
Yeah mate, have tried all that gear.... she just wont get outta it im thinking its the 4wd sensor switch??
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FollowupID: 437011

Reply By: cipher - Tuesday, Jun 27, 2006 at 23:27

Tuesday, Jun 27, 2006 at 23:27
Will it be on 4WD? or just 2WD?
AnswerID: 180747

Reply By: Travelling Pixie - Wednesday, Jun 28, 2006 at 12:44

Wednesday, Jun 28, 2006 at 12:44
my 60 series had it's light stuck on once when i tried to disengage 4wd with the front hubs still locked

i unlocked the hubs and tried again and it worked (i think - nothing has blown up yet)
AnswerID: 180814

Reply By: ross - Wednesday, Jun 28, 2006 at 15:53

Wednesday, Jun 28, 2006 at 15:53
Hi justin The t/case shifter is vaccum activated.
There are 2 vac hoses into the shift mechanism ,one for in 4wd ,the other for out of 4wd.
If you think its stuck in 4wd the hoses can be swapped,so the button function is reversed,in on is off ,off is on.
Causes for them to malfunction is lack of vaccum caused by leaks.
Trace the 2 hoses back to the solenoids on the firewall on the rh upper side.
If no leaks and the hoses are on correctly follow the vac lines from the solenoid to the inlet manifold.
If all that checks out it may have a leak in the diapragm on the t/case which is easily dismantled and repaired.

To test if its in 4wd ,unlock the fwh and turn the front driveshaft by hand,if it wont turn its in 4wd.

Dont go hitting anything with hammers
You can save a lot of headaches and get a better understanding of how it works with a Gregorys manual for $29.95.

Here is a thread on someone who cant get 4wd,probably the same reason you cant get it out.
forum.ih8mud.com/showthread.php?t=98017
AnswerID: 180834

Follow Up By: cipher - Wednesday, Jun 28, 2006 at 16:42

Wednesday, Jun 28, 2006 at 16:42
Hi Ross,

I looked into this hose issue,

And i believe in my circumstance that you left off one of the possible causes?

I believe that my solenoid is dead... Because if you think about it, if you swap your hoses around on the outgoing side of the solenoids and you can get it to lock into 4WD which the hoses around one way and unlock OUT of 4WD the other way then there is one symptom, and that is one solenoid is dead, because you have used both hoses to either activate or de-activate 4WD, you have just changed between solenoids....Would i be correct in saying that??

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FollowupID: 437141

Reply By: ross - Wednesday, Jun 28, 2006 at 19:40

Wednesday, Jun 28, 2006 at 19:40
I suppose a solenoid could be dead but I cant remember hearing of one dying.
Its always the other things I mentoned.
You could also check there is power to the solenoid and of course the button has been known to fail as well.

The vaccum is constant while the engine is running and the solenoid switches it from one hose to the other.
At least one side of the vaccumm should work regardless.
AnswerID: 180879

Follow Up By: cipher - Wednesday, Jun 28, 2006 at 19:47

Wednesday, Jun 28, 2006 at 19:47
Yeah well when i hit the switch i can hear the relay closing and opening... There appear to be two solenoids of which the relay would select which solenoid to use which would either lock or unlock 4WD. True?
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FollowupID: 437168

Follow Up By: cipher - Wednesday, Jun 28, 2006 at 19:50

Wednesday, Jun 28, 2006 at 19:50
becuase the way i figure if there is a constant vaccum being created from the intake manifold or whatever and going through the solenoid and if the t/case requires a vaccum to activate either 2WD or 4WD wouldnt there need to be a vaccum all the time? Which would put alot of wear on the 2WD solenoid?
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FollowupID: 437169

Follow Up By: ross - Wednesday, Jun 28, 2006 at 20:36

Wednesday, Jun 28, 2006 at 20:36
Yeah well when i hit the switch i can hear the relay closing and opening... There appear to be two solenoids of which the relay would select which solenoid to use which would either lock or unlock 4WD. True?

answer:true

becuase the way i figure if there is a constant vaccum being created from the intake manifold or whatever and going through the solenoid and if the t/case requires a vaccum to activate either 2WD or 4WD wouldnt there need to be a vaccum all the time? Which would put alot of wear on the 2WD solenoid?

answer: yes there would be vaccum all the time but it only needs it when you want change modes.

I dont think it would put a lot of wear on the solenoid.Its only 53 kpa or 5-6 psi.
Mine is 18 years old and stillworks perfect.

Only time I had a problem was when I did an engine swap to diesel and dislodged some of the soleniod plug wires and it was stuck in 2wd.
Plug was still sitting there but not making contact,maybe you could look at that.
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FollowupID: 437180

Follow Up By: cipher - Wednesday, Jun 28, 2006 at 22:36

Wednesday, Jun 28, 2006 at 22:36
Yeah ill have to investigate it in a little more detail to tell you the truth i was just wrapped to get the car outta 4WD, thanks very much mate for your help you have been an excellent help!

I will have to get the Multimeter out and see if im getting anything near 12V (wonders where or what fuse they would come off) and see if its getting the juice, or wether it is a solenoid problem or even a relay problem... however i can hear the relay click when i depress the button to the 2WD position.. so im guessing that its not that.. plus rare for relays to play up... ill check everything electrical,

thanks again...

Justin
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FollowupID: 437218

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