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Jeff: The tranny guys (just had it rebuilt) tested the vacuum. They actually took the unit apart (also used air to move the yoke shaped unit inside the adapter back and forth). He used a meter to test the voltage from the switch and got erratic readings. I believe the 4WD is working. Though I took it back to my son at school over the weekend. I'll ask him to do the test you recommend to be absolutely positive it is going into 4WD. Note: The light is working under certain conditions. For example it was on all the time when I got the Jeep back from shop. It appears that it was plugged in backwards. When on the way home with it the time before last that I took it back to the shop.....the light voluntarily came on & stayed on - it was not in 4WD. Is it possible that they have the vacuum lines reversed coming from the transmission or is there only 1. Finally, is there any documentation available on the web to refer to that you know of?
Thanks, Tom
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Tom
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