My 4wd indicator lights not working. I had a new trans put in, it worked before the install but not after. From what I can tell all the vaccum hoses look good, I crawled under the jeep today and checked everything out. So I was thinking about going with a posi lock system. I'm not even sure if it will fix my problem with the light. I found a perm lock system for 1/2 the price of the posi lock. Being that I have a front lock right locker am I going to run into problems with the perm lock? Also, it feels like my 4wd is working despite the light not coming on, however I read on here that I'm not locked in....
Check the sensor for 4WD before anything. It is on the CAD housing. Either use a tester to check continuity with it open and closed, or close the circuit on the wire going to the sensor and see if the light turns on.
I'M FLEXY AND I KNOW IT
95 YJ, 2.5 AX15 conversion, 4.0 TB, SOA +1.5", 33" DC Crusher Tires, 8.8 Rear w/welded tubes + LSD, Spartan Locker HP30 Front w/solid axle swap, Rocky Road OTT kit, Safari Snorkel, Warn VR8000 Winch, Smittybuilt front Bumper, JKS Disconnects, AA SYE, Teraflex Shock Bar in Rear, 1/2" Boomerang Shackles, RE Add a Leafs, Homebrew Traction Bar, Monstalined in&out, LED Tail lights, 1700 Watt Stereo
Start easy. Check the bulb in the dash. Then move to the switch. Unplug the wire at the CAD an short the two conductors with a small piece of wire.
Check those and post back. We can trouble shoot further.
If it feels like 4 wheel is working then it's probably one of those two things.
If your 4 wheel is out, then check the vacuum system, make sure you are getting vacuum on the switched side. If not, your vacuum switch may be bad. Then make sure the diaphragm isn't full of rust and mud and moves freely. If both of those are fine pull the CAD cover and make sure your shift fork isn't broken and that the collar slides easily over the splines of the outside axle shaft.