Quote Originally Posted by HBOY
here's a series of test...with a multimeter (voltage meter)

engine off... check voltage of batt... that should be around 13V+

start engine. check voltage reading at idle. it should be around 13.8V.. anything less than 13V (12V or less.. kulang charge ng battery mo)... anything more than 13.8 IC/regulator ng alternator mo is busted

if at this point nasa 13.8 range ka pa.. start turning on your accessories one by one... you should see a drop in voltage.. but once everything is running.. you shouldnt drop below 12.8V (the lowest should be 12.2V at idle)

rev your car with accessories on.. the voltage should climb back to around 13.5V... if it doesnt.. alternator is dead... if it goes over.. check IC/regulator ng alternator
diba depende rin sa vehicle yung reading?
Sa akin L300VV diesel. ano yung voltage reading ng alternator.