 Different voltmeter readings? |
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| SKL1 |
 Jul 14 2025, 08:44 PM
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Senior Member  Group: Members Posts: 1,717 Joined: 19-February 11 From: north Scottsdale Member No.: 12,732 Region Association: Upper MidWest 
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I've noticed with my '71, which has about 120K miles on it, the voltmeter is pretty much always reading around 11 V regardless of speed or revs.
In my '73, which has about 77K miles on it, it reads 11 or so at start up and for the first couple miles and then goes up to between 12 and 13. I swapped the voltage regulators for the heck of it and it didn't change anything. Is the older alternator from the '71 just worn out?? Not looking forward to changing it with the engine in the car!! |
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| emerygt350 |
Jul 17 2025, 11:36 AM
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Advanced Member Group: Members Posts: 3,052 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Yes, but you really shouldn't even look at that voltmeter unless you run it directly to battery. Get a DMM on the posts while the car is running.
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Posts in this topic
SKL1 Different voltmeter readings? Jul 14 2025, 08:44 PM
Spoke The dash voltmeter on my '71 reads between 12-... Jul 14 2025, 10:46 PM
GregAmy You should check the battery voltage with a DMM.
+... Jul 17 2025, 08:32 AM emerygt350 That dash volt meter is great for reminding you th... Jul 15 2025, 03:49 AM porschetub
That dash volt meter is great for reminding you t... Jul 15 2025, 05:18 PM SKL1 Good to know. Thx guys. Jul 15 2025, 07:25 PM barefoot I substituted the cigar lighter for a USB double p... Jul 16 2025, 02:45 PM 930cabman
I substituted the cigar lighter for a USB double ... Jul 17 2025, 05:53 AM SKL1 My initial entry was a little simplified- I actua... Jul 17 2025, 10:16 AM GregAmy I put the modified engine from my '71 in the 2... Jul 17 2025, 12:32 PM SKL1 Both engines have their original alternators which... Jul 17 2025, 09:18 PM Spoke On my car I measured the battery voltage and recor... Jul 18 2025, 09:55 AM |
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