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Ron, ASE Certified Technician
Category: Dodge
Satisfied Customers: 35822
Experience:  ASE Certs
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I have a 2001 dodge 2500 5.9 cummins and I am getting weird

Customer Question

I have a 2001 dodge 2500 5.9 cummins and I am getting weird readings off of the alternator. I took it in and had the alternator tested and they said it was bad so I bought a new one. Now the volt gauge inside doesn't even register and a check gauges light came on. I used a volt meter on the battery with it running and I'm getting 11.6 volts but when I check it at the alternator I'm getting 29.7 volts which is suppose the be around 14.5 volts right? Could it be the pcm?
Submitted: 2 years ago.
Category: Dodge
Expert:  Ron replied 2 years ago.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
Normal running voltage at the alternator should be right at 14 volts. if you are getting 11.6 volts at the battery then the new alternator is not charging. In order to determine if the problem is the PCM you are going to need to do some testing starting with a code scan, if you can get the code scan done and post back with the results I will help you get this resolved.