FLoydster, it depends. On some VRs the red light only illuminates if there is a problem... most generally with the HZ ouput. Low output voltage could be as simple as a cleaning or replacement of the brushes/slip rings (if yours is a brushed version). Could be a problem in the quadrature. Could also be the Voltage regulator. What brand/model genset is this on?
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified