1991 Toyota Corolla Not Charging

1991 TOYOTA COROLLA
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BARNEY REBBLE
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  • 1 POST
I just brought this Corolla it's great but my battery lite is now ON. It has came on before but then turned off a couple of times . I removed the battery and car stays running . I also removed the alt. and had it checked at autozone just today and it "passed" I looked at 100 Amp fuse located on the positive cable and it looks to be fine . There is a inline 30 Amp fuse also on positive cable whitch was melted ,I think it got too hot , but I believe that fuse goes to radio or something else . What could it be ?
Thank You Jeff
Jun 2, 2006 at 7:14 PM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
There is no original 30 amp fuse from the battery. It is for an add on boomer radio set up.

Get you alternator cheked by putting a meter across the battery. Trun you lights on. It sould read between 13.8 and 14.7 volts. If is in the 12v range the light will light.

The Zone doesn't check an alternator under load.
Jun 4, 2006 at 3:22 AM
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Suggested Repair

Measure charging voltage across the battery with the lights on. It should read about 13.8 to 14.7 volts; around 12 volts means the system is not charging under load and the alternator or charging circuit needs further diagnosis. The melted inline 30-amp fuse is not original and is for an aftermarket radio, not the charging system.

Conversation Summary

The owner of a 1991 Toyota Corolla reports the battery light is on, though it has gone off before. The engine keeps running with the battery disconnected, an AutoZone alternator test passed, and the 100-amp fuse looks fine. A melted inline 30-amp fuse on the positive cable was also noted. The expert says that fuse is not original and serves an add-on radio, and that the alternator should be checked under load by measuring battery voltage with the lights on. A reading of 13.8 to 14.7 volts is expected; about 12 volts will cause the warning light.

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