John Rudd, still learning TRS

[4bye4]

I have an 89 Ranger 4X4 extened cab, with a 2.9, automatic, and 250k on the vehicle. In cold weather, when I push the 4X4 button on the dash, the black box behind the left jump seat, 'clicks', and no 4X4. There is a white button on the top of the black box, when pushed, a red LED glows. I know there are 3 components in the system. I am looking for diagnostic starting points and pssible cures. Happy New Year to you>>>>>John

 

[Ranger44]

Try cleaning your shift motor first.

http://www.therangerstation.com/forums/showthread.php?t=89&highlight=shift+motor

4x4 controller might be bad.

 

[krugford]

My old 92 4x4 did the same thing. I ended up replacing my shift motor and it fixed the problem.

 

[Ranger44]

Nevermind on the controller. If the LED Glows, it's in working order.

 

[4bye4]

How do I respond to those that helped

Thanks to your suggestions, I know what I will be doing this weekend. I will post the results>>>>>John

 

[4x4junkie]

The 4WD controller is working if you hear the relays click, and the LED flash (I think it was) 4 times when you push the white self-test button ('94 & down controllers).
If the LED glows steady, then the self-test failed.

You MUST unplug the two wiring connectors off the end of the controller for the test to work properly though (leaving it connected only by the pigtail connector).