1997 Ford Expedition $ Wheel Drive will not engage.

#66B

MEMBER
1997 FORD EXPEDITION

Drive Train Axles Bearings problem
1997 Ford Expedition V8 Four Wheel Drive Automatic

I engaged the front end manually & ty wraped, no lights come on the dash, no low range either.
One was ground, another was dash lights, there are 2 dark blue in the center.

(1) should there be power at the switch?

Any other knowledge on this would greatly appreciated !

(2) Any ways to test acuator on transfer case?

5 Replies

KHLOW2008

MECHANIC
41,815 POSTS

Hi #66B,

Thank you for the donation.

I do not understand the symptoms described and hope you can provide a clearer description.

1. 4WD engages without the dash indicators showing?
2. When engaged to Low range, what happens? Stuck in High or no power transmission?
3. Does 4WD indicator light works at any time?

Tests can be carried out with the aid of Diagnostic tools.

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Monday, February 9th, 2009 AT 2:27 PM

#66B

MEMBER
7 POSTS

It will not go into 4-wheel drive or 4 low, no lights come on either. The vacuem soliniods are not working, with my vacuem pump the axles engage & disengage with no problem, I manually engaged the front axles & ty-wrapped engaged, to rule that out. Should I have power at the dash selector? I have a Innova 3140 Scan Tool, can this help me? There is no sounds from the motor on the transfer case when moving the selector on the dash, that is why I started with the fuses & then the switch. Any diagrams of the wiring would help also.

New to the site, but I will be on here often, Thanks

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Monday, February 9th, 2009 AT 10:07 PM

KHLOW2008

MECHANIC
41,815 POSTS

If the scanner can be used to retrieve DTCs and read data streams, it might possibly work but I am not sure about that.

I will provide you the wiring schematics and see if you can come up with anything.