Question about 1998 Dodge Ram 1500 4WD
Step 1 would be to see if the vacuum supply switches from one hose to the other on the front axle disconnect. It's a vacuum servo on the front axle, and has 2 hoses going into it. BE CAREFUL as you will have it running and be right under the engine and fan. If it sucks through one hose in 2WD and the other in 4WD, the transfer case switch is working properly, and the servo is suspect. Also, did you test drive in a parking lot to see if it actually in 4WD and just not turning the light on, or is it definitely not going into 4WD?
Posted on Jul 02, 2009
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Posted on Jan 02, 2017
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