Battery drain only when headlights on and car running
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Battery drain only when headlights on and car running
I put a new alternator and battery into my car, if I drive the car without the headlights on, the voltage stays at around 12V but the second I put the headlights on, voltage drops to 0. When I turn the headlights off again, instantly jumps back to 12V. Not affected by rpm
1984 Camaro berlinetta
1984 Camaro berlinetta
Joined: Mar 2001
Posts: 10,405
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Battery drain only when headlights on and car running
It is not dropping to 0V in reality. Ignore the gage in dash and put a real voltmeter on the battery terminals to figure out what's really happening with system voltage. Could be just a localized problem in the wiring to/from/in gage panel.
Last edited by QwkTrip; Apr 14, 2021 at 12:02 AM.
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