Battery light on - what could cause it (1 Viewer)

[odessit]

LC 07, 190k, alternator replaced at 145k, battery replaced in October, 2019. Battery light on dashboard turned on two weeks ago and today. Both times turned off after starting a car and running it for a bit. Car was seating on a driveway without driving since Sunday - not that long.
Do I have a leak in electrical system draining battery? Something else?

 

[jerryb]

say it with me folks,
what is the battery voltage before a cold start?

 

[AlpineAccess]

What did you replace the OEM alternator with?

 

[MUDZLLA]

Could be a drain somewhere. Disconnect a battery pole and test with ammeter. If you see 0.1 amps thats 1.2 watts per hour your battery is draining at. If you have a 600 Amp hour battery you should have 6000 hours before it's dead or roughly 6 months.

 

[odessit]

Alternator was done by previous owner at Toyota dealership - hopefully it is Toyota remanufactured one. Will check for a drain. So far - light is not coming up after a bit of driving.