Question about 1999 Ford Explorer

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How to disengage 4wd ford 99

I have Ford Explorer 99 4WD. I seems to be in 4WD all the time. Is there a switch or something else that will switch it to 2WD?

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  • Ford Master
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Only if equipted that way.. it may be a full time all wheel drive ..

Posted on Dec 29, 2013


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Posted on Jan 02, 2017

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SOURCE: 98 explorer - 4wd and 4wd low light both blink 5-6

the transfer case motor is defective.

Posted on Jul 08, 2009

  • 984 Answers

SOURCE: 2003 Ford F-150 4WD is not working. Light does not

Which type is it, ESOF ( Electronic Shift on the Fly ) or MSOF ( Mechanical Shift on the Fly ) ?

Best to check by jacking the truck up ( taking safety precautions, parking brake, chock the wheels, jack stands, etc ), turn the key to the run position and place into 4WD.
If the front drive shaft turns, the problem is in the transfer case.
If the front drive shaft does not turn, the problem is in the front axle.

I would suspect the front shaft does not turn, and the most common cause of this is the vacuum motor on the front axle, the vacuum lines to it, or the vacuum solenoids.
The vacuum shift motor is what locks the front wheels in, and without this action, the PM does not get the confirm that the truck is good to go, and illuminate the cluster indicators ( 4x4, and if 4L the Low Range lamps ).
There are 2 vacuum solenoids, one is 4WD one is 2WD ( to move the motor one way or the other ).
Start with checking for vac on the vacuum motor ( actually it is a diaphragm ). The pink line should have vacuum when in 4WD, the blue line should have vacuum when in 2WD. If not, time to work back towards the solenoids. Use a short length of hose on the vacuum solenoids, and retest.
If still missing vacuum on the 4WD solenoid, I would suspect it is bad, but best to test on the other side of it, to make sure the vacuum reservoir ( mounted behind the battery box ) is supplying vacuum to the solenoids.

This is just the most common cause, best to confirm with the 1st test above, to know if you should look to the trans case, or axle.

This is what the vacuum shift motor looks like on the front axle

These are the vacuum shift solenoids

Posted on Dec 12, 2009

  • 474 Answers

SOURCE: 2002 Ford Explorer 4WD. 4WD is inopertive.

put a ground strap from your transfer case to your transmission. also with someone listening under the car with the key on but not running put your foot on the brake, shift to neutral and turn the selecter to 4x4 low and see if you can hear the actuater respond

Posted on Dec 19, 2009

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I have a 1998 explorer and the 4wheel drive will switch on like it should and the lights do not blink or anything but I can tell the rear end doea lock in low but never any power to front axle in any...

On these issue,there are few solved help links for troubleshooting the issue easily.-------

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1 Answer

4wd on my 2005 ford explorer limited will not turn off

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On my '98 Ford Explorer, the 4WD Low light went on when i put it in high. Then i went to disengage it and the 4WD Low light won't got off, and now my car will barely accelerate

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Today I fixed the vacuum lines to the front differential (nee transaxle). I had trouble finding parts in the local auto store that would do the trick - but I got something cobbled together. Based on my experience, I can go back to the store and get the right parts for a proper fit.

As of now, 4WD will engage but will not disengage - clearly one of the connections is still poor, or I accidentally switched the ports, or the vacuum shift motor (attached to the front differential) is shot (obviously from abuse).

As near as I can tell, once I switch into 4WD-HI, it will not shut off. 4WD-LO will engage and disengage properly. If I turn the car off for a while, a couple of times 4WD has disengaged. Hmmm...

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1 Answer

4wd not engaging no indicater lgt basicaly no 4wd

I had a prolem with my 1998 Ford Explorer XLT. The 4wd indicator light would randomly start to blink while moving and when I flipped the switch to 4wd hi or low it would engage but easily disengage and the indicator lights would not come on. I was hearing a grinding sound coming from my hubs so I replaced both front hub assemblies and the light stopped blinking and 4wd hi/low works great now. it was about 300 bucks for the hub assemblies and only took me an hour or two to change.

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