4wd problem help

JeDanRo · September 22, 2014

2001 4.0 Explorer, 4wd not working. When I bought it, I was told it was the actuator on the transfer case, but I've seen where the modual may also be a problem. I'm looking for any help in diagnosing this problem, and which part it may be, I appreciate any help.

drdoom · September 23, 2014

First thing I would do is check for voltage at the brown wire. Fuses you may want to check the ones pertaining to the 4wd system (owners manual).

Bobmbx · September 23, 2014

Open the jack stowage panel and have someone cycle the 4wd on and off with the key in "Run". You should hear a "click" from a the control relay that is located in that space.

At least thats where I think the TC relay is located.

drdoom · September 23, 2014

Bob, is that the TOD torque on demand relay? If so, that would be a good one to check.

JeDanRo · September 23, 2014

What should the voltage
be?

drdoom · September 24, 2014

About 0.6V at zero duty, and about 5.6V at full duty.

4wd problem help

JeDanRo

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drdoom

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Bobmbx

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drdoom

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JeDanRo

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drdoom

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