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2003 Ram 2500 Cummins High Voltage from Alternator

3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

2003 Ram 2500 Cummins High Voltage from Alternator

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Jan 13, 2026 | 11:02 AM

#11

HeyYou

Administrator

Joined: Apr 2010

Posts: 87,475

Likes: 4,223

From: Clayton MI

Don't bother going to the dealer, it's the PCM that's that problem. Contact the company you got it from, get your money back, and try a different company.