Question about 1987 Ford Bronco II
The vehicle will not engage into 4 wheel drive,vehicle has been idle for about 8 yrs.
Posted by Anonymous on
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Posted on Jan 02, 2017
The sound is not coming from the glove compartment, it is coming from the panel behind the drivers seat, that's where the relays and computer are located.
The relays click and apply power to a transfer case motor.
The motor attempts to turn a shaft that engages the front drive shaft.
When the computer thinks the shaft has NOT turned it tries again.
It will try three times then quit, figuring the shaft has not turned.
Get someone to crawl under the vehicle and engage the 4WD (just turn on the ignition- do not start the engine) See if they can hear the motor attempt to turn the shaft, it will make a clicking sound.
If not the connections or the motor may be bad.
I have found the most probable cause is the relays on the control board.
If you are technically adept --
you can remove the small side panel from behind the drivers seat and remove the control board. (remove the power plugs first)
Clean the relay contacts and bend them a little to give them more 'wipe' to keep them clean longer.
Put it back in and turn on the ignition.
Then push the RESET button on the side of the board.
Try the in / out 4WD a couple of times. If it doesn't work turn off the ignition, turn it back on and push the reset button again.
Posted on Oct 27, 2008
could be a faulty switch or the lock out on the diff may be bad, In woudl start at the switch first and work my way down.
Posted on Dec 31, 2010
SOURCE: 96 ford bronco 4 wheel
I know on some of the older Ford 4WD's the vehicle had to roll a little before the 4WD would lock in. And on some of the Ford 4WD's with the hub lockouts, someone had to roll the vehicle while someone else had to physically lock each hub by hand.
Posted on Jan 27, 2011
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