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Old January 24th, 2011, 06:24 PM   #1
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Default 1996 Dodge 1500 has no vacuum (no 4wd)

I try to put it into 4wd and nothing happens, no 4wd light. The transfer case is working fine because it will go into low range and the front driveshaft wont spin freely by hand in 4wd. I replaced the vaccum shift motor (4wd actuator) on the axle and its moving 1/2" like it should be but not getting any vacuum pressure to the actuator. I followed the lines to the vacuum switch on the transfer case and theres no visible leaks. Then i took the vacuum switch off and it seems to be moving up and down freely like it should. I dont think I'm getting vacuum pressure to my vacuum switch. Any ideas what it could be?
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