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dash voltmeter indication - charging well? 200

I installed a voltmeter with tack and clock many months ago. All works well.

As far as I've always noticed, the voltmeter is always a hairline below the red, I guess around 14.5 volts.

Around two weeks ago, when I startup the car to idle, without throttle, the voltmeter reads exact 12 o'clock, I guess around 12 volts. If I throttle, after 2-3 seconds it goes up to the usual 14.5. During driving it always stays at 14.5.

Is this indicative of a dying battery? Could it be the charging system not being effective? Should I replace the alt brushes (is it simple, never touched that)? Anything else?

BTW, my idle is always steady at around 600 rpm. The car is very well maintained by me, no issues, no poor history, relatively a virgin except for key maintanance.

Advice?

Thanks,
Greg Mustang
Montreal - Ottawa
Canada








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    dash voltmeter indication - charging well? 200 1988

    I just installed a VM to an ignition powered fuse also. Is there an "unregulated" power lead under the dash to watch true charging voltage as mentioned in the original posting?

    Peter P.
    Portland, OR








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    dash voltmeter indication - charging well? 200

    I agree with the below answers, plus on my voltmeter its reading depends on what electrical equipment is operating. This is because it's connected to a circuit on the 'I' switch position (accessory) and the use of the radio, blower fan, etc. causes a bit of voltage drop in that circuit, while battery voltage as seen on a multimeter, is around 14.1V.
    --
    Bob (81-244GL B21F, 83-244DL B23F, 94-944 B230FD)








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    dash voltmeter indication - charging well? 200

    Keep in mind that your voltage regulator also varies the charge level with ambient temperature (in the engine compartment). A cold engine compartment (and presumably battery) will be charged up to a high level -- as temperature rises, the regulator will cut the charge to a lower level.
    You can see this especially in the winter -- when I start out, my voltmeter shows almost red (as yours does), while after driving around for a while, the voltage moves down to the middle of the range. In contrast, in the summer, the transition takes place sooner.
    It sounds like everything is good in your system.








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    dash voltmeter indication - charging well? 200

    Greg:

    If you're not noticing any other voltage issues, there's most likely not a problem. 12 o'clock on the 240 voltage gauge is actually 13 volts, and the alternator always makes more power above idle. If you start noticing slow cranking, etc., then the battery may not be getting enough juice. Otherwise, I wouldn't worry.

    --
    Guid ('88 244DL 231k, '92 745 180k)







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