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battery idiot light on when ignition switch is off but... 1987

posted by  david hunter on  Fri Dec 12 01:12 CST 2003
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last visit: Mon Jun 30 22:10 CST 2014
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If that light stays on with key removed from ignition that indicates a bad diode in the new alternator. It provides a path for 12 volts to the light which gets a ground through the filaments of the ther indicator bulbs. Sort of a backwards circuit. Alternator can still charge some with this condition. In all conditions removing that connector will turn the light off, the wire goes directly to the bulb. Therefore pulling the wire does not mean you are now charging no more than pulling the bulb. With that wire removed you will definitely be not charging.

Have you put a meter on the battery while running to see if you are charging or not.
--
David Hunter






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New battery idiot light on when ignition switch is off but... [200][1987]
posted by  reysc subscriber  on Thu Dec 11 10:58 CST 2003 >


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