Question about 1985 Chevrolet Corvette

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Volt meter is giving a false reading of 16.8 volts and dash lights are flickering.

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Change altenator or regulator if its a seperate unit

Posted on Jun 15, 2009


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What is the right output from alternator. My is charging 15.0.Is that to much or it is ok

should be between 13-14 volts is that reading your dash gauge is putting out if so i would check it with a volt meter dash gauges are unreliable they are never calibrated and are usually there for operator reference

Apr 21, 2015 | Cars & Trucks

1 Answer

I've also changed the battery and alternator my

you don`t say what year and model this is. if you have a system charging at 16 volts, then you know its over charging. are you checking this with a volt meter independent of the car as the meter in the dash maybe wrong. if its over charging with an independent gage it could be the computer as it controls the ground circuit to cause the system to charge and discharge to keep the charging rate within specs. the flickering is a result of the over charging.

Aug 31, 2014 | Cars & Trucks

1 Answer

Have replaced battery and alternator now battery light stays on

14.2 is perfect as far as voltage is concerned bt ther could be other issues. Was it a new alternator. A used alternator couldhave bad diodes giving you a false light.Most of the franchise parts houses such as autozone advance some others,do a charging system electrical check at no charge.That would be my advice to you as well as having them clear the computer. Good luck to you.

Aug 26, 2014 | 2002 GMC Envoy

2 Answers

Battery wont charge, battery/ABS/SRS/BRAKE lights come on while driving and flicker. voltage increases to dash lights/fan speed/headlights periodically.

Get a volt meter, start your car and see how many volts your car is producing while running. Should be around 14 volts. May want to watch the meter for a while since your electric seems to fluctuate. Most voltage regulators are internal of your alternator. If you are getting a lot more or less than 14 volts while running, replace the alternator. If it is not charging, voltage will drop as vehicle runs, until battery is dead.

Dec 12, 2013 | Cars & Trucks

1 Answer

2002 bravada replaced alternator and battery. Still only showing about 10 volts on the dash gauge. Intermittently sets ABS and BRAKE lights on dash. Battery has not been a problem though. Could the...

Yes it could be could be connection at the battery term. If you have a DVOM (digital volt ohm meter) hook it to the battery turn it on 30 volt dc scale, start up the car and see what it reads.If the readings are less then 13 volts wiggle the wires at the alt. and batt. and watch the meter.

Jul 29, 2012 | 2002 Oldsmobile Bravada

1 Answer

Intermittent Charging Problem. I posted a question a couple of days ago about an intermittent charging problem. The volt meter will drop down to 12 volts +- and the battery light will come on and remain...

When you wire it in, run a hot wire directly from the battery to the volt meter (this will give you a more accurate reading) The instructions will come with the volt meter on how to wire it. Just make sure about the hot wire coming directly from the battery.

What I would do first is take off the alternator and go to a parts store and have them test it for free. This will save any additional purchases. Good Luck.

Nov 21, 2010 | 1990 GMC Sierra

3 Answers

Headlights flickering consistant with engine RPM. also, battery light on dash flickers with RPM

Your alternator is worn or the voltage regulator (usually built into most modern alternators) is failing.

Mar 01, 2010 | 2000 Mercury Cougar

1 Answer

2003 Pathfinder LE AT Oil Brake and battery light flicker

.I spent a lot of time and head scratching over the exact same problem ...YOU NEED A NEW REGULATOR (it is in the alternator).repair options are ;replace voltage regulator only , rebuild complete alternator , replace alternator with a rebuilt one , or replace alternator with a new one
The clue was getting diff. readings on your volt meter ....mine would spike up to 18 volts but you have to put your volt meter on and get yourself a cup of coffee (or a beer) and stare at your meter for atleast 15 minuits after the engine is heated up ....

Jun 29, 2009 | 2002 Nissan Pathfinder

2 Answers

85 corvette is showing 16.8 volts on voltmeter and dash lights are flickering.We have checked alternator and battery and both are showing 13.8 volts as normal.

16.9 v will blow every bulb in the vehicle and damage any sensitive electronics. You alternator is runing wide open.and not charging. Actually its the regulator in the altrnator. It will cook your battery as well. need replace and battert check. - good luck

Jun 16, 2009 | 1985 Chevrolet Corvette

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