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Alernator Voltage & ABS Light

gregaudio

By gregaudio
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gregaudio Enthusiast

gregaudio

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'02 Camry, V6, automatic. I noticed while driving today that my ABS light comes on when the engine is over 1000RPM but turns off while idling. I put a multimeter on the battery terminals and notice that the alternator voltage will reach 18V at about 3000RPM. While stationary in Neutral I can press the accelerator and watch the tacho and the voltage. The ABS light comes on as the alternator reaches 17V.

I have checked the battery, all cells are full of water and the Voltage only drops from 12.6 to about 12.4 when I select high beam with the engine off.

Any thoughts or suggestions would be much appreciated.

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Hiro Grand Master

Hiro

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Sounds like the regulator in the alternator is gone - you should never be getting more than ~14.5V when the engine is running, otherwise you'll cook the battery.

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gregaudio Enthusiast

gregaudio

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Thanks Hiro. Driving home tonight the car radio would shut off at higher revs too. Will limp it to an auto sparky ASAP before something melts.

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