How I fixed my 4 wheel drive light(mini-write-up)
Well, I guess I'm just one of those OC nut cases, that has to have everything work, or I think that my Jeep is an airplane, but when my 4-wheel drive indicator light went out it really bugged me. Like it really wasn't going into 4 wheel drive because the light was off. Well here's how I fixed mine.
1) Makes sure the transfer case linkage is adjusted right. FSM tells you how to adjust the linkage.
2)Make sure the vehicle REALLY is going into four wheel drive. You can do this by a fast start on a gravel road and watch the skid marks or you can put the Jeep up on jacks, leave the emergency brake on, put it into 1st gear put it into 4wheel and just slowly take your foot off the brake just enought to watch the front wheels turn a bit. (I stalled when I did this, but the front wheels did turn)
3)Check your fuses in the fuse block behind the glove compartment to make sure they're allright.
4)Determine if the light works. Unplug the connector off of the transfer case switch
located on top of the transfer case in front on the drivers side. IT just lifts off of a small clip, very easy. Connect a jumper wire between the connector you just pulled off and a good ground. With your ignition switch in the on position the light should light if it is good. If it doesn't it's probably the bulb. Mine lighted so that narrowed it down to the transfer case switch.
5) I replaced my transfer case switch with a new one and a new o ring.
Part#'s: Switch: #J8134473 O-ring: #4338956 = $31.01(dealer items)
Use a deep 7/8" socket and torque to 15-25 ftlbs.
Ya know, that switch is a really weird thing. It is a ball bearing vacumm type switch that turns on the circuit when a little ball is sucked away from the contact.
Does anyone know how this works? I didn't realize there was that much of a vacuum in your transfer case when you tuned on the 4 wheel drive. Just wondering how the thing really worked.
Have fun with your own light.
Gun Metal Blue Jeep Club Member #99