Connor280ZX Posted January 21, 2014 Share Posted January 21, 2014 I'm driving along this morning and my dash lights start to flicker. Then they stay on. I look over to the volt meter, and the needle is in the red zone with the warning light on. I push the clutch in to let the engine idle and the voltage goes back to normal. I try coasting the car to work as much as I can to avoid blowing up the battery. If the engine speed is raised above 2000 Rpm, the gauge pins itself. Alternator was replaced 4 months ago. Battery connections are very tight. I've had a problem like this before, but the voltage would drop. Replaced the alternator and it stopped. Now there's this. What do you guys think? Quote Link to comment Share on other sites More sharing options...
NewZed Posted January 21, 2014 Share Posted January 21, 2014 The regulator in your alternator might bad. Alternators fail in different ways. Or the S(ense) wire might have become disconnected. Check at the alternator T plug to make sure it sees battery voltage. I've had the L wire loose contact at the T plug before, a wiggle and some contact cleaner and it was back to normal. Quote Link to comment Share on other sites More sharing options...
FricFrac Posted January 21, 2014 Share Posted January 21, 2014 Regulator would have been my first guess but NewZed is already on it Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted January 22, 2014 Share Posted January 22, 2014 Have you actually measured the battery voltage when this happens? Have a friend in the car hit the gas while you are checking the battery voltage or alternator output to see if it really is going that high. Quote Link to comment Share on other sites More sharing options...
Connor280ZX Posted January 22, 2014 Author Share Posted January 22, 2014 Ok just took voltage readings, and it's outputting 16 Volts at idle. I thought the regulator was independent from the alt... That's really a PITA. Quote Link to comment Share on other sites More sharing options...
Connor280ZX Posted January 26, 2014 Author Share Posted January 26, 2014 Replaced the alternator, problem went away. Thanks guys Quote Link to comment Share on other sites More sharing options...
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