My 4wheel drive whent out the same time the parking lights blowed the fuse i replased the fuse the lights are working i hear the axuwaiter work on the transfer case i also have replased the gem maudgual and the vackum axuwaiter valve by the battery i noties with the vac line going to the front hubs has vack just for a few seckonds what else do i kneed to check
SOURCE: superwinch locking hubs
i would think so other wise you will have a large vacume leak and truck will run bad too.
SOURCE: 98 Ford F150 4x4 wont engage
I copied something that you might use because it was handy I know its not going to be exactly for you but it might get you fixed. Let me know if it helps or NOT please. gl dc
SOURCE: 2002 ford f150 4x4 manual transfer case vacum
The vacuum shift solenoids have power to one side of them at all times.
The GEM applies ground to them, to activate them, after the shift on the fly position confirm from the trans case.
The power to both should be on the White w/ Light Blue stripe wire.
Ground to them ( from the GEM ) is
2WD : Gray w/ Black stripe wire
4WD : Red.
The only TSB I know of is for the 04-06 MY trucks, for the IWE solenoids ( the kind without the water shield ).
Did you jack up the front end ( and support correctly ) turn the key to the run position ( do not start ), and shift into 4WD, and check the front drive shaft ?
If the shaft still turns, the problem is in the transfer case, if not you are looking in the correct place.
The GEM will not signal a vacuum solenoid until the transfer case has shifted into 4L or 4H ( 4 switches that are the return signal to the GEM ). Could be a problem with the connector on the transfer case ( think it is a 8 or 10 pin connector ) to the contact plate position switches in the trans case.
There is a manual front ale cable, but I would think you would want to confirm why the GEM is not signalling the shift solenoids, prior to replacing them
Posilock make a kit for the F-150
SOURCE: 1996 ford explorer 4wheel drive will not engage
make sure your 4WD switch is working.and fuse is okay.because your 4WD is control by 4 electric shift motors in which drive a rotary cam which moves the mode fork and range fork inside the transfer case to select between 2WD HIGH A4WD - 4WD HIGH AND 4WD LOW RANGE.a shift motor sensing plate on the shift motor monitors the range in which the transfer case is operating a transmission range sensor monitors the gear position of the transmission.which must be in neutral to shift into low.a pair of solenoids one for 2WD one for 4WD.mounted on the upper right firewall route vacuum to the vacuum motor which engages and disengages the center axle disconnect collar in the front axle assembly.a 4 x 4 shift motor relay module contains two GEM controlled relays which shift the transfer case shift motor between 2WD and 4WD modes.a solid state clutch relay activates the A4WDclutch inside the transfer case.
SOURCE: 1995 ford F-250 diesel 4x4 automatic hubs won't engage.
i have a 1995 7.3 dont rev up over 2 grand
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