Lights on 4x4 panel stay lite ???

[GT11]

Have a 94 GMC Jimmy. The indicator light on the 4x4 panel (in front of the 4x4 shifter) stays lite. Though the 4x4 shift lever is pushed all the way forward (indicating 2 wheel drive). The panel lite sometimes goes out but on no regular basis. Just wondered if there is a switch that might be sticking on the front end somewhere? The vehicle undercarrige is pretty funky. A lot of oil leaks over time that have now been fixed.

Thanks guys


GT

[MT-2500]

Yes the light works off of a switch.
Could be the switch or could be the front axle is not locking in or unlocking good.
Check vacuum to it and front actuator.
First see if axle is locking and unlocking right.
Also when shifting in and out of 4W put transmission in neutral or back up a little to take it out of a bind and let it get in and out good.
MT

[GT11]

Originally Posted by MT-2500

Could be the switch or could be the front axle is not locking in or unlocking good. Check vacuum to it and front actuator. MT

So where exactly is this switch/actuator located on the front axle?

Thanks

GT

[MT-2500]

Is the axle locking in and unlocking?
Up in the how to section there is a lot of info on the actuator.

[blazes9395]

By the light, your talking about the front axle portion light if I am right? This operates on the switch like MT mentioned. This light will go on/off based on whether the front axle is engaged or not. The switch is located on the front differential. Again like MT mentioned, check and make sure your front axle is engaging/disengaging. The light may be working fine and its your front axle that not working as needed.

[Sparky1349]

Originally Posted by GT11

Have a 94 GMC Jimmy. The indicator light on the 4x4 panel (in front of the 4x4 shifter) stays lite. Though the 4x4 shift lever is pushed all the way forward (indicating 2 wheel drive). The panel lite sometimes goes out but on no regular basis. Just wondered if there is a switch that might be sticking on the front end somewhere? The vehicle undercarrige is pretty funky. A lot of oil leaks over time that have now been fixed.

Thanks guys


GT

I had an 87 S-10 PU with the same issue, it turned out to be the vacuum switch on the transfer case. The plunger sticks in the activated state, sometimes for a few minutes and sometimes for weeks at a time. I don't know if the 94's have the same setup but the actuator for my 87 was mounted on the inner fender on the passengers side. When the vacuum switch is stuck the diaphram was pulled in all the time the 4x4 light was on. If you pulled the vacuum line from the actuator the diaphragm would release and the lights would go back to 4x2. If it is the vacuum switch you have to use a crow foot to get it off, there is not room between the transfer case and the floor pan. Vacuum Switch is on transfer case near the shift linkage on the drivers side.

Good Luck,
Sparky

[GT11]

Thanks guys for all the help. After I work my wifes Buick, I'll get on that Jimmy.
I'll let ya'll know how it turns out.

GT