I was wondering of anyone has had the issue of the 4 wheel drive not engaging. I have the manual shift in the floor. I've replaced the 4 wheel drive actuator, twice now. I get no light or message on my dash as to what's wrong. No codes or anything. I have power to the actuator. Is there a relay built in to the fuse box that isn't listed.
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first things first. if your not familiar with the 4x4 system on these trucks and how its all tied together electrically, you need to find somebody who is and speak with them
mechanics 101 says that if a component doesnt have clear signs of failure then you need to bench test it. did you bench test the original cad actuator ? if not, it may be in good working condition and your problem lies else where. ive never had to test one but you should just be able to apply electrical current to the plug plongs and the motor will turn on and slide the fork. wiring diagram may help determine what electrical current is needed for testing. other wise consult with someone familiar with these electric systems
the second actuator you installed. was it genuine aam part or chinese knockoff ? im not even sure there is knockoff actuators but figured i would ask. stay with genuine aam parts
i believe it is possible to install the actuator in the axle housing and have it not be aligned in the collar groove. double check proper installation
the fact youve replaced two actuators and still theres a problem leads me to think that likely you have something going wrong elsewhere. we have these newer rams at work and the 4x4 system is extremely reliable for us