Battery is going dead when vehicle is turned off

HONDA CIVIC
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LIENSALEMAN
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  • 2 POSTS
I changed my battery, drove it around. Came back about 6 hours later and battery was dead. Nothing was left on. What could cause this. 1990 Honda Civic Hatchback 210,000 miles
Mar 18, 2007 at 4:05 PM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
Certain things are constantly pulling juice all the time. Clock, radio, theft system are always drawing power. Then there could be a light that is not shutting off with its own switch, ie trunk, under hood, etc. Something is pulling juice and you need to start at one end and work your way through to find the cause.

If that fails, an internal malfunction of the alternator would be the next culprit. Replacement time.
Mar 19, 2007 at 7:08 AM
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