electric 4x4 NOT WORKING
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Sorry but I think this is over my head. I'm surprised more people haven't chimed in on this!
Search the threads on this. There is a ton of info on this topic. Most of the time it seems like the motor that inguages the transfer case does work or makes some noise. Its ussually either the switch that tells the truck its in 4 wheel or the front diff. vaccum switch that inguages the front. However, if you aren't hearing any indication of the electric motor switching the transfer case I'd probable start by looking at the fuses that control that electric motor. Check your owners manual to find the right one. I think you have one under the dash and one under the hood. Then perhaps the connections on the elect, motor and the switch(4x4) itself.
good luck. Let me know what you find,bullseye670......
Search the threads on this. There is a ton of info on this topic. Most of the time it seems like the motor that inguages the transfer case does work or makes some noise. Its ussually either the switch that tells the truck its in 4 wheel or the front diff. vaccum switch that inguages the front. However, if you aren't hearing any indication of the electric motor switching the transfer case I'd probable start by looking at the fuses that control that electric motor. Check your owners manual to find the right one. I think you have one under the dash and one under the hood. Then perhaps the connections on the elect, motor and the switch(4x4) itself.
good luck. Let me know what you find,bullseye670......
#7
Join Date: Dec 1997
Location: Windsor,Ontario,Canada
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Start by engaging 4x4 with the truck in park. Jack up the front till the wheels are off the ground. Try turning the front drive shaft. It should not turn. I am betting that it does.
Check fuse #17 30amp in the Power Distribution Box under the hood. Check fuse #23 10amp in the Junction Box Fuse/Relay Panel under the dash. If they check out engage 4Hi and with a rubber mallet go tap the electric shift motor. While you are under there check the connector for corrosion. Has any exhaust/tranny work been done lately?
JMC
Check fuse #17 30amp in the Power Distribution Box under the hood. Check fuse #23 10amp in the Junction Box Fuse/Relay Panel under the dash. If they check out engage 4Hi and with a rubber mallet go tap the electric shift motor. While you are under there check the connector for corrosion. Has any exhaust/tranny work been done lately?
JMC
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#8
Same scenario here. My dash lights all work, I can here the xcase doing it's job, just no front axle. I'll recheck the vac lines, can anyone tell me where to get the solenoid (or whatever it is) that's at the differential? I'm a Jeep guy and all this vaccuum electronic stuff is new. I just pull the lever and go. Thanks for the help
98 expy with a4wd BTW.
98 expy with a4wd BTW.
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#10
Originally Posted by abigjeep
Same scenario here. My dash lights all work, I can here the xcase doing it's job, just no front axle. I'll recheck the vac lines, can anyone tell me where to get the solenoid (or whatever it is) that's at the differential? I'm a Jeep guy and all this vaccuum electronic stuff is new. I just pull the lever and go. Thanks for the help
98 expy with a4wd BTW.
98 expy with a4wd BTW.
Applying to one side inguages the other disinguages.
#11
The solenoids that actuate the vacuum motor on the diff are on the firewall, passenger side, near the hinge. One solenoid disengages the front diff, and the other engages it. In 2wd, you should have vacuum out the disengagement solenoid, and in 4wd, vacuum in the other. If it does have vacuum correctly, check the vacuum lines, the vacuum motor on the diff, and the fork in the diff that engages the front. That has also been known to break.
#13
4X4 light works but no 4 wheel
I have a 2003 F-150 4X4 with the 4 wheel drive switch on the dash and mine is doing the same thing. I am a little confused about the vacuum thing. Could someone give me a list of things to check. The light comes on when i turn the switch to 4 wheel. We just got a bunch of snow. Would that have anything to do with it????
#14
Originally Posted by JMC
Start by engaging 4x4 with the truck in park. Jack up the front till the wheels are off the ground. Try turning the front drive shaft. It should not turn. I am betting that it does.
Check fuse #17 30amp in the Power Distribution Box under the hood. Check fuse #23 10amp in the Junction Box Fuse/Relay Panel under the dash. If they check out engage 4Hi and with a rubber mallet go tap the electric shift motor. While you are under there check the connector for corrosion. Has any exhaust/tranny work been done lately?
JMC
Check fuse #17 30amp in the Power Distribution Box under the hood. Check fuse #23 10amp in the Junction Box Fuse/Relay Panel under the dash. If they check out engage 4Hi and with a rubber mallet go tap the electric shift motor. While you are under there check the connector for corrosion. Has any exhaust/tranny work been done lately?
JMC
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