Service 4WD light.....

[HD-Nate]

On my trip a few weeks ago, I got the

[More Power]

Your experience with the "Service 4WD" warning is similar to mine.

There are a series of Hall-Effect switches located in the motor drive module on the transfer case. These are set/unset depending on the position of the transfer case shift selector on the transfer case. I suspect these switches can lose their way occasionally, if not used.

When I began seeing the service 4WD light every time I drove the truck, I decided to exercise the transfer case by selecting each of the available positions, including neutral.

Having done that, the service 4WD light has not returned, after several weeks now.

MP

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