4wd module

[joeltexas]

I have a 2004, 4WD Sport Trac. I am the original owner. For the last year or so, everytime I want to engage the 4wd, I have to unplug the two plugs that go into the module. Plugging them back in, and sometimes applying some diaelectic grease always works. Is this a common problem? Am I looking at replacing the module and wiring along with the plugs that lead to the module for a permanent solution? Any ideas would be apreciated, greatly.

 

[ncranchero]

Fairly common problem but I wouldn't think you have to do it regularly, especially after applying the di-grease. Are all of the pins in the connector locked tight in the connector?

 

[joeltexas]

They seem to be, as there is a clicking sound when plugged in. It will engage atleast once after plugging back in, so it seems t be plugged in well. Recently, it would not engage on a very cold morning. After driving with the heater on for an hour or so, I tried it and it engaged. Pretty puzzling. Has anyone ever tied spraying canned air to maybe clean the contact points? I've seen this used on computers.

 

[ncranchero]

You may have a bad solder joint on the board since it works once or after the heater was on a while and the vehicle got warm. Those problems are difficult to diagnose.

 

[joeltexas]

Would changing the moduel correct this? I hate to star replacing parts in hopes of fixing the problem.

Other wise, this is a great truck, never missed an oil change, garage kept, one owner, 4wd works great, when it works.

 

[ncranchero]

Check all of the connections first, including the one at the shift motor on the T-case.

 

[joeltexas]

Will do, is the shift motor connected to the xfer case