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4x4 light will not come on.help

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Old 02-23-2013, 05:04 AM   #1
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4x4 light will not come on.help

1998 toy 4x4 auto trans auto hubs.looked under truck saw cv joint on left side was leaking grease bad.tried the 4wd and would not go into 4wd no 4x4 lihgts on dash and will not lock in front dif.anyone know if bad cv joint can cause this problem?any help would be great Thanks
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Old 02-23-2013, 05:07 AM   #2
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I would say a bad CV will not cause this all my cvs are torn and i have no problem with 4x4. I have never heard of a problem like this before.
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Old 02-23-2013, 05:28 AM   #3
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check your fuses/4wd relay/box? had a friend who bought a 4x4 4runner. the guy he bought it from said the 4wd didnt work. got to looking around and found out the fuse was blown. worked like a charm ever since.
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Old 02-23-2013, 05:29 AM   #4
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maybe the wire is unplugged from the switch behind the dash?
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Old 02-23-2013, 05:30 AM   #5
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I cant remember how 4 wheel drive is driven on the 98 but I beleive there is an actuator on the front axle .The front axle Could be vacuum controlled or could be electrical ...dont remember
When you select 4 wheel drive on the transfer case , 12 volts is applied the the actuator on the front differential to move a shift fork to the 4 wheel drive position .
Once the shift fork on the front axle locks into the 4 wheel drive position , the light will illuminate .
Using a test light , Test for 12 volts at the front differential actuator when you shift the transfer case into 4x4 .
A torn cv boot will not cause you to lose 4x4
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Old 02-27-2013, 03:49 AM   #6
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gearcruncher.THANKS for the help.hundreds of people on this site and you were the only one who had any idea about this problem.THANKS LYN TRYAN
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Old 02-28-2013, 04:36 PM   #7
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Hey , no problem . Thats why I am here ...

So was the front differential actuator the problem ?
Did you have 12 volts at the wiring harness at the front actuator harness or is this vaccuum controlled ?

I have more diagnostics for you if need be . Let me know
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