2002 4x4 Problem -- not like others?

[jorwex]

Hey Guys,

So I've read a slew of 4x4 related issues and haven't found a thread with the symptoms I've been experiencing. Most/all of which seem to be resolved by replacing the control module.

There are no clicking sounds, no lights blinking on either the dash or the 3 Control-Trac buttons, and no strictly intermittent working problems.

It just doesn't engage, or give any feedback that you pressed a button at all. I've tried starting it from neutral (although that seems to only need to be done for 4x4 Low acoording to the manual). Also, I think it's worth mentioning that it didn't stop for any known reason---there was no loud or grinding sound one day, it didn't die after any maintenance...it just didn't work one day.

So my question is

1) Is my situation any different than all these other cases that have different symptoms?
2) Are there any tests that I can perform on my control module to see if it is indeed the culprit? Any measurements I can take with a multimeter while the car is running or not?

 

[thepotroast]

Well the first basic question would be have you checked your fuses under the hood? Specifically #17 and #18?

 

[jorwex]

Oops! Forgot to mention that I did do that already. Thanks for asking!

 

[firman]

i would say control module, u could also try disconnecting neg bat. for about 15 min to reset computer, u can also reset comp. by disconnecting neg side bat and touching it to the positive side. then hook bat. back up and see if 4x4 works. it did for me but only temp. i ended up changing cm. all good now