04-21-2026, 11:44 AM
Hi Everyone! I am the new owner of coach #390.
I am having an alternator voltage fluctuation. On VMSpc I am showing between 12.8v and 13.1v at idle. When I am driving with the generator running, I am showing 14.1v to 14.6v. Generator off it 13.8-14.1.
I noticed the grounding wire seems a bit frayed where it connects to the alternator. I am going remove the air intake piping and test alternator voltage.
Any other suggestions? I apologize if this isn't the right category.
Thanks,
Mark
I am having an alternator voltage fluctuation. On VMSpc I am showing between 12.8v and 13.1v at idle. When I am driving with the generator running, I am showing 14.1v to 14.6v. Generator off it 13.8-14.1.
I noticed the grounding wire seems a bit frayed where it connects to the alternator. I am going remove the air intake piping and test alternator voltage.
Any other suggestions? I apologize if this isn't the right category.
Thanks,
Mark
Mark Maderic
New Caretaker of 1995 Newell #390
Rosenberg TX & Franklin OH