Question about 2007 Ford F-150 Harley Davidson

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4WD not engaging

2007 Ford F150 4wd

I turn the 4wd selector switch, nothing happens in Hi or Lo range.

When I start the vehicle, the 4wd Hi and Lo indicators flash on and off like it always has.

I checked the Fuses and Relay. They are fine.

This is very frustrating since I olny have 38K on the truck.

Please help?

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  • 196 Answers

Most the newer trucks have a vacuum system and some time you need a smoke machine to find the leaks. Try checking by each front wheel you will find a vacumm hose that goes to the wheel hub it is mounted on a bracket at the frame with a small plastic splice check that for cracks if it is cracked or there are any leaks it will not work let me know what ya find.

Posted on Jan 06, 2009

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Posted on Jan 02, 2017

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