1992 Isuzu Rodeo Camper Turbo Diesel. I'm getting only 12.25 at the most when at idle at the battery. Changed the grounds and and other cables possible. Tested the Charging relay (BLue) tested good but ordered another. I pulled the alternator to get tested tomorrow from a shop that is familiar with that type if Isuzu Alternator with the vacuum pump. Any thing else I should be looking at? Been working on 7.3's and Cumins for years, This is a new one. Happy to learn.
Cheers Mates,
Patrick
Boulder Colorado