alternator

1998 GEO TRACKER
Avatar
GSWIND20
  • MEMBER
  • 1 POST
My car keeps stopping on me every few months, and mechanics keep saying it's the alternator, so I've gotten at least 3 new alternators within the last year, and the car battery has died on me again! and the battery isn't bad cause I had it checked!
Dec 3, 2010 at 7:21 PM
Advertisement
Avatar
JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Use a digital multimeter across the battery posts, everything off, the generic spec for a full charge is around 12.6 volts. Take second reading with vehicle running, the second reading should be higher than the first, if the charging system is working. The charging system needs to be tested on the vehicle. Another possibility is excessive battery drain, everything turned off?
Dec 3, 2010 at 7:28 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.