- Feb 27, 2010
I went out to to motorhome today to start it up and run the systems. It is a winnebago vectra with a cummins engine. Everything wen well except that on initial start up I notice the buzzer for the low air pressure was changing tones. So on further inspection I notice the the voltage indicator was fluctuating between about 12.8 and 13.8 volts. It did this for maybe 5 minutes then settled down to the normal range and stayed there for about the hour drive that I made. Is this something I should have looked at prior to hitting the road tomorrow? Is this an indication of a failing alternator or maybe voltage regulator? - (I'm not even sure if diesel engines have them). Maybe the batteries? Any ideas would be appreciated.