Vehicle's a '97 Suburban C2500 with the 454. The voltage reading on the ScanGauge-II would fluctuate between 12.6V - 13.3V, depending on whether or not the lights and air conditioning were turned on, so I decided to have it tested. Here are the results:
The battery is an Optima Red Top, and I'm not sure if the alternator has been replaced before, but I'm lead to believe this has something to do with the diodes in the alternator? Am I looking at a new alternator? Are diodes sold separately?
The battery is an Optima Red Top, and I'm not sure if the alternator has been replaced before, but I'm lead to believe this has something to do with the diodes in the alternator? Am I looking at a new alternator? Are diodes sold separately?