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1999 Mazda RX7 battery probalems

Tiny
WANT2WORK209
  • MEMBER
  • 1999 MAZDA RX7
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 195,000 MILES
MY car battery keeps dying I replaced my alternator and just got a new batt on fri on i't sun and it was dead this moring. I tested the alt when the car is running i'm getting 13.5v so i'm assuming the alt is working i'm out of ideas and money
Sunday, July 4th, 2010 AT 3:04 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,755 POSTS
Hi want2work209. Welcome to the forum. 13.5 volts is not ideal but it should be enough to charge the battery enough to start the engine. You might find the voltage creeping up as the battery becomes charged. It should be between 13.75 and 14.75 volts.

If you can drive all day with no problems, then the battery is dead the next morning, look for something not turning off and draining the battery. A glove box light, trunk light, vanity mirror light, and cell phone charger are common causes.

Caradiodoc
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Sunday, July 4th, 2010 AT 3:41 PM

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