Jeep Wrangler Forum

Jeep Wrangler Forum (http://www.wranglerforum.com/)
-   General Jeep Discussion (http://www.wranglerforum.com/f19/)
-   -   Need help with testing 4 wheel drive (http://www.wranglerforum.com/f19/need-help-with-testing-4-wheel-drive-131718.html)

staticat 01-07-2012 12:40 AM

Need help with testing 4 wheel drive
 
I need help I am going crazy. I have no dash lights telling me if 4 wheel drive is engaged. All my other gauge lights work I dont know if my 4 wheel drive is working. Is there a way I can test the 4 wheel without running the jeep. Also is there another sensor that tells the lights on the dash to turn on? I did replace the bulbs and checked the gauge fuse. It is driving me nuts :banghead:

ou812 01-07-2012 12:56 AM

You could jack the jeep up on blocks and test the 4wd

Or with the jeep not running,e brake on.
Put the jeep in 4wd
jack up one front tire only off the ground and try to spin that tire thats in the air.
If that tire cant spin the the 4wd is working or you have a front locker thats locked.

If you spin that tire and the front driveshaft spins 4wd isnt engaged

Check the 4wd shift linkage to make sure its connected.

The funnest way to test is to go find a mud hole to spin tires in,If the front is throwing mud in the air.....its working

Jonny15 01-07-2012 10:30 AM

The easiest way I've found to test the 4wd if the light doesn't work is simply to put the jeep in 4wd and on dry pavement turn the wheel sharply and go slow. If the jeep bucks and binds you know that the 4wd is working properly. If the 4wd is working but the light still wont go on and you've checked the dash light and the fuse then its most likely the 4wd position indicator sensor thats screwed into the transfer case. It's an easy fix, all you need is a new indicator and a socket wrench. I don't have a picture of it but someone else here might have one. If not you can look it up online.

SirGeorgeKillian 01-07-2012 10:44 AM

Pjt a large zip tie around your front drive shaft and dont cut off the tail. You will hear if it is in 4wd....

s14sh3r 01-07-2012 11:07 AM

What year? My 97 will run a cluster diagnostic if I turn the key on while holding the trip meter reset.

redneckpilot 01-07-2012 01:20 PM

You could just find a dirt/gravel road somewhere, and give it a little gas... if you feel it in the steering wheel, you know you're working front and rear.

Umbra0101 01-07-2012 01:34 PM

Don't run the thing if you jack it up! If you have lockers or posi, it'll drive right off the jack!

Mud and a gas pedal will usually do the trick too. Just get someone to watch or set up a video cam. Just remember that unless you have lockers, it's not true 4WD, one tire per axle will usually get power, the other wont. That stops you from sliding all over the road when it's wet. When you go around a corner, the outside wheel has to make more revolutions than the inside. That's why they stopped making solid axles decades ago.

Ngarc83 12-07-2012 09:33 PM

Quote:

Originally Posted by staticat (Post 1896455)
I need help I am going crazy. I have no dash lights telling me if 4 wheel drive is engaged. All my other gauge lights work I dont know if my 4 wheel drive is working. Is there a way I can test the 4 wheel without running the jeep. Also is there another sensor that tells the lights on the dash to turn on? I did replace the bulbs and checked the gauge fuse. It is driving me nuts :banghead:

My jeep does the same thing. I put in 4wd but the light does not turn on. But when I put in 4wd and try turn slow in the parking lot, it starts to buckle. I though something was wrong, but I just got my answer. Thanks everyone.

bobjenkins 12-07-2012 11:20 PM

Quote:

Originally Posted by Umbra0101 (Post 1897658)
Don't run the thing if you jack it up! If you have lockers or posi, it'll drive right off the jack!

it will drive off the jack with all 4 wheels off the ground?


All times are GMT -5. The time now is 12:00 AM.