I Might Just Know What I'm Talking About
Join Date: Sep 1999
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Re: First Snow and no 4x4 Need help with Vac. Disc
The wires on the axle actuator are just for the 4 wheel drive light. So when the actuator slides fully, the light comes on. No light, no actuator sliding over. If light is on, actuator has slid over. Conversely, if the light doesn't go out, the actuator has not slid back to 2WD.
They can get gummed up. Take the actuator off, see if it slides freely back and forth by hand. Pull a vacuum off the motor and try to actuate it in your hand. If it's tight, put some oil on the shaft inside the actuator - there are bushings in there that the shaft slides in, that can get dry.
If it's deadso (torn diaphram), you can just slide it over and put the front end in 4WD, and just drive it with the front end locked in, and change the transfer case from 2WD to 4WD. TJs are like that all the time - they don't have a disconnect. You might lose 1-2 mpg in 2WD spinning the whole front end, but it's not a big deal. I run my front end locked in all the time. I've also taken the disconnect apart, and shimmed it over so it can't slide back to 2WD on it's own, too. Then I took out all the vacuum lines and called it done. [img]/ubbthreads/images/graemlins/smile.gif[/img]