wont go into 4 wheel drive (high/low)

[bigwick70]

i have a problem that my 97 EB expy WILL go into "aw4x4, but not high or low. what do you think could be the cause. a friend told me theres a little motor that engages all that so... but my S-10 had vacume lines and a manual shifter in the floor/ plunger under the hood on the passengers side. hummm. any ideas? although it does go into a4x4 its still annoying...

 

[Captain Morgan]

Yup we have recent threads here about this same issue and how to diagnose and replace for around $150 or less. Thread says things like "check the fuse" and "use a volt meter to .." blah blah blah 1.21 gigawatts . . .



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[FordandPolaris]

If you know the thread, post the link. I would start by checking the fuse as was said, it is fuse 104 under the hood on the 1st gen expy's. I think if the fuse were bad you would not see any A4WD either, although I am not positive. Otherwise next thing would be the transfer case shifter motor or the switch inside the cabin. I think the A4WD uses a magnetic clutch to operate while the 4x4 high and 4x4 low are mechanical operations within the transfer case.