1993 Buick Roadmaster Limited 8 Cyl 5.7L
why does the reading of volts fluctuates from 15 to 12 on the voltage meter on the car's dash board?
new alt,coil,rotor,distributor,wireset, and spark plugs...if I leave the daytime running light switch on the battery drains
AutoMD Member 4/26/2012
Check at the battery with a voltmeter, if its the same your alternator is bad, if not it's a bad gauge.