Hey guys I’ve got a 2002 Ford explorer sport 4 wheel drive and the 4 wheel drive has stopped working. It worked fine a year ago when I bought it but has stopped working. Is there a fuse that could have blown and stopped it from working?
looking at the ford explorer chat rooms there is a fuse for that, start there. Any flashing lights?
Here is a possible help forum to explore.
Corrosion is common on rarely used electrical systems.
Switch, relay, shift motor and every plug in the series may be a corrosion fault.
Inside the switch or relay is pretty hard to tell but ( after checking the fuse ) start by UN-plugging and RE-plugging components along the chain of command.
not a real easy job to prove out if there’s a completely bad component without knowing the circuits to test and when.
- this brings it to a shop. - -
The reason I speak of corrosion over time goes back to my 92 Explorer.
twice . . with lack of use over mild winters and of course summers . . . my switch did nothing too.
When a tech traced it to the shift motor not engaging . . I tried an experiment.
Since it was my own truck, if the experiment failed, it was just my own time spent.
- on the shift motor
where the wires enter through a cover with three screws. .
I took off the cover . . cleaned the contact fingers inside . . Re-assembled ( careful to align the cap right )
and . . ?
A working shift motor once again.
- on the shift motor
not to say this is your problem , but it sure sounds all too familiar.
We soon discovered that off-the-books solution to be an answer to many ( not all ) diagnoses of a bad shift motor.
Here is an exchange between a mechanic and some one with the same problem…
the most common problem for this year and vehicle is the 4x4 module goes bad and needs to be repalced
If the light is not coming on and no4x4 more than likely the module needs replaced
Is a module the same as a sensor and therefore something a mechanic needs to replace
no the module is the computer under the passenger side dash
It is easy to replace but I would recommend diag first
No warning light on module going bad and I guess explains why the it the auto 4wd doesn’t engage
check for codes with a special tester that most shops have
Sounds like I need an appointment with ford to run diagnostics and replace module