Got a problem with a astra GTE 2ltr 16v
cars idling or driving with no additional power drain (i.e. lights, stereo) and the battery meter on digidash is showing 12volts (2 bars)
driving the car in night with lights on, stereo, wipers battery meter is showing 12 volts (2 bars) but every now n again (every 5 minutesish)it drops down to 1 bar (9v) stays for a while then goes back the 12 volts. All the electrics seem slow (wipers, windows etc) where the engine is running or not. The main flash beam is not much powerfuller then the side lights!
The battery is brand new (as in this morning), the alternator is also new (replaced this year i believe).
Any ideas as to why when the engines running im only showing 12volts instead of the 13/14volts that i should get.
Any ideas as to why its dropping down to 9v (1bar) when ive just got a few normal things turned on
The alternators gotta be charging the battery as ive probably started the car a good 20 times today and been driving around with lights on, stereo, fan permantly on (only this morning for a test), if it wasnt charging the battery would of died by now.
There is a big earth lead going from alternator to chassis.
the alternator belt is the correct tension.
the engine (as far as i can tell) is running perfect, idealling great and doesnt need servicing.