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Voltage meter gauge is at 18 volts! - 1984 Plymouth Reliant

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Alternator


Most likely there is a problem with the voltage regulator in the alternator or it could be a bad gauge in the instrument cluster but I would lean more to the alternator being bad.

Aug 10, 2012 | 2004 Dodge Durango

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What should the voltage guage read


should read between 12 an 15 amps

Apr 05, 2012 | 1997 Saab 9000

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Ammeter reads 18V with engine running.


I'm assuming you mean the charging voltage indicator. This is an indication of an incorrect charging voltage (too high, should be from 12.5 to 14 volts). This problem is most likely caused by a bad charging voltage regulator. There are two variations of the location of the regulator: 1) regulator is outside of the alternator and located on right side of the engine compartment on the wheel-well, below the starter relay or 2) The regulator is inside the alternator (in which case you'd have to replace the alternator).

Sep 01, 2011 | 1993 Ford F350

1 Answer

Volt gage jumping arround less notice when under load


I would first suggest using a volt /amp meter and test the voltage from the large wire off the back of the Alternator. You will need a second person to help feather the throttle to change the engine speed. You should see a steady increase in voltage from 12.6 to 14.5V when the idle is increased. If the voltage jumps around on the meter then chances are you have a bad voltage regulator in the Alternator and need to replace it. If the voltage is normal and doesn't bounce around then you have a faulty gauge in the dash.

Jul 31, 2010 | 1995 Chrysler LeBaron

2 Answers

1994 olds cutlass supreme volt gauge shows low I have a new battery and a new altenator could the both battery and altenator put out correct volts no drain on battery even change dash volt meter still in...


check with a volt meter if u have 12 volt at the big lead on the back of the alternator engine off

if thats good start engine check to see if alternator is charging check the battery a good alterntor charges 13.5 - 14 volts, u may have a bunk alternator

Mar 25, 2010 | 1994 Oldsmobile Cutlass Ciera

1 Answer

How can i fix the petrol guage that is not


do you know that petrol gauge is a sort of volt meter.there are five things requir to operate it.1st of all see to it that movement of gauge is working.give 1.5v of a battery directly to gauge for amoment if gauge doesn't move change the -ve to +ve even then it doesn't move it means gauge itself is faulty.if it moved look out for a wirewound resistor in fuel tank.if it is open then gauge will not work.if that is good look for voltage across resistor normally 12v are given.if 12 volts are there then look out for flot.connect a voltmeter to gauge,move the flot by hand very slowly and see if the varition in volt meter if it is not there then look out for connecting wires from gauge to fuel tank.i think you can do it now

Jul 10, 2009 | 2001 Volvo V40

2 Answers

Voltage irregularity


Well that's ABSOLUTELY NOT TRUE, the voltage regulator is in the ALTERNATOR. This vehicle needs an alternator and that should take care of this problem. Good luck and thanks for using FIX YA

Jan 27, 2009 | 1998 Jeep Wrangler

2 Answers

Alternator may be overcharging?


Yes It sounds like the voltage regulator inside the alternator has gone wide open .It can also ruin your battery and explode the battery.I would have it hooked up to a alternator tester and just to make sure it's not just your gauge.hope this helps

Jan 24, 2009 | 1999 Chevrolet Silverado 1500

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