AFTER CAR WARMS UP AND I DRIVE IT FOR ABOUT 20 ...

  • Tiny
  • Anonymous
  • 1993 Subaru Legacy
  • 233,000 miles

After car warms up and I drive it for about 20 minutes I take my foot off the gas and the lights get dim and the heater starts to blow cooler air. When I push the gas pedal after a stop, the light brighten back up and the heat starts to blow warm air again. I replaced my alternator about 4 months ago. The research I've read suggests a belt or bad battery or battery terminals. Any suggestions?

Thursday, January 24th, 2013 AT 12:14 AM

1 Answer

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Alternator is most likely the issue.

Check the voltage at the battery with the engine idling and then at 2000 rpms

Roy

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Thursday, January 24th, 2013 AT 12:35 AM

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