I just picked up a 1999 expedition about 2 weeks ago, everything works on it with the exception of the 4wd. Ive read alot of the posts about this with the 4wd being stuck people getting blinking lights, the 4x4 light coming on and the front diff not engaging or the windshield leaking on the gem module. Ive checked the vacuum system and it all seems to work i have no leaks , ive verified that my windshield is not leaking into the cabin.
So here is the issue and i think it maybe the switch , when i turn the vehicle on i do get a 4x4 light so i know that the light is operational. However if i turn the switch to 4h or 4l i get no light and it doesnt appear or sound like anything is engaging at all. Ive been looking for a wiring diagram for the system and cant seem to find one.
Does the xfer case shift motor give power to the switch or vise versa? Since it is all time 4wd im not exactly sure how it operates . All the fuses have been checked with a multimeter and are good with pwr applied. Any mystical insight would be greatly appreciated.
So here is the issue and i think it maybe the switch , when i turn the vehicle on i do get a 4x4 light so i know that the light is operational. However if i turn the switch to 4h or 4l i get no light and it doesnt appear or sound like anything is engaging at all. Ive been looking for a wiring diagram for the system and cant seem to find one.
Does the xfer case shift motor give power to the switch or vise versa? Since it is all time 4wd im not exactly sure how it operates . All the fuses have been checked with a multimeter and are good with pwr applied. Any mystical insight would be greatly appreciated.
