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Ford f150: Been working on 99 f150 4x4, new switch, new vacuum…

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Been working on 99 f150...
Been working on 99 f150 4x4, new switch, new vacuum units, new vacuum valve's (on fire wall)repaired lever on fork in front trans. case I now have to turn truck off to go to 2 wheel or to go to 4 wheel, if I leave the vacuum hoses connected it will jump back and forth 2 to*****also changed gem mod
Submitted: 3 years ago.Category: Ford
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Answered in 1 hour by:
6/15/2015
Ford Mechanic: James, Ford Technician replied 3 years ago
James
James, Ford Technician
Category: Ford
Satisfied Customers: 3,634
Experience: Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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Hello and thanks for choosing just answer? When you changed the gem module did you have it programmed?
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