 Different voltmeter readings? |
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| SKL1 |
 Jul 14 2025, 08:44 PM
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Senior Member  Group: Members Posts: 1,714 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 15 2025, 03:49 AM
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Advanced Member Group: Members Posts: 3,037 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
That dash volt meter is great for reminding you the blinker is on, and that's all. I put a relay in and wired mine direct to the battery. Now it is useful. The original wiring to the meter now turns on the relay which brings fused 12v direct (more like 13.7 when the car is running) to gauge. No damage to the original wiring and works great.
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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
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 |
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