4x4 wont engage
#1
4x4 wont engage
i have a 1990 v6 extended cab pickup that is an automatic and i just got a new motor installed and i tried the other day to engage it into 4 wheel drive and the light doesnt come on and the front wheels dont engage. i was told it most likely was a vacuum problem so i checked the two vacuum lines comming off the transfer case for leaks and i didnt seem to find any does anyone have an idea of how to fix this and what to test. maybe a vacuum line diagram. anything will be apreciated
#4
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If you have ADD, the vacuum lines will go from the front differential to two valve switches located on I believe the passenger side fender just to the left of the p/s pump.
#5
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Also check the electrical wire that connect to the front of the front differential, the wire goes through your alternator to the wire harness so check that if it is connected, it might of be disconnected, mine has that problem and it was the wire has disconnected like someone did it on purpose.
#6
i have checked the vacuum lines and i have switched them and thats not the problem and it seems like the electrical is connected well i beleive i need to check to see if i get power and if i get vacuum. the two vacuum lines come off the transfer case and go to the blue and red things that are on the passenger side of the truck and i have checked those and they seem like there in the right place but it still doesnt work and i have tried to switch those. if i was to check the vacuum and the electrical what should they read
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