Ok, I have a 2006 Ram 1500 / 5.7 Hemi Quadcab, there have been 3 time when I went through a Car Wash then see my service 4wd light come on. When it comes on it stays on for about 5 minutes and my 4wd will not work until it goes out. The People at the Dealership are baffled...

 

sounds like a loose connection getting water into it. try spraying down with a hose....see if it happens that way.

 

Agreed, the connection has to be getting wet. locate the connection, take it off and make sure its not in bad shape. then put it back on but applysome electrical grease(cant think of exact name but i call it that). That should take care of any future problems with it. If the trucks still under warrenty, (Im assuming it is) tell the dealer you think its that and have them look at it. They are probably "baffled" cause they want to let it go as long as they can (until your warrenties up) so they can charge ya. My grandfather had something like that happen to him.

 

Do a search for TSB # 03-001-07. It applies to trucks buiult on or before6-1-07

This bulletin involves replacement of the Front Axle Disconnect (FAD) actuator and

selectively erasing and reprogramming the Totally Integrated Power Module (TIPM) with

new software

.

The vehicle operator may experience one or more of the following conditions:

A). The four wheel drive (4WD) system may not engage or disengage as designed, when

the drive mode is changed between 2WD and either 4WD Auto or 4WD Lock (or back to

2WD from 4WD).

B). An illumination of the

“SERV 4WD” message in the Instrument Panel (IP)

C). When four wheel drive (4WD) mode is selected, the amber “4WD” lamp flashes

continuously in the IP signaling that the 4WD system has not been engaged.

D).

Diagnostic Trouble Code (DTC) C1464 - Front Axle Disconnect (FAD) High Side

Short To Ground - is present in the TIPM.

This condition may be due to TIPM software and its affect on the FAD actuator

mechanism.