 Voltmeter reading? Accuracy? |
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| SKL1 |
 Jan 5 2026, 09:52 PM
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#1
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Senior Member  Group: Members Posts: 1,745 Joined: 19-February 11 From: north Scottsdale Member No.: 12,732 Region Association: Upper MidWest 
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Trying to figure out how accurate the OEM voltmeter is in my '73 2.0. To make a long story shorter the engine in the car is a much modified 1.9 from my '71, with approx 120K miles on the alternator.
Voltmeter reads around 11V and drops to 10 if I turn on the headlights. Immediately goes back to 11 or just over that with the lights turned off. Replaced the voltage regulator this AM and did a test drive with no change. Gauge never gets close or above 12V. Makes me afraid to drive it at night with the lights on and go very far. Do I need to go through the hassle of rebuilding the alternator or trying the alternator from the original 2.0 engine that has about 70K miles on it? Better way to get a more accurate reading of actual voltage?? I hate electrical issues!!!! TIA. |
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| GregAmy |
Jan 10 2026, 02:39 PM
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#2
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Advanced Member Group: Members Posts: 2,615 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States
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Yup, charging system inop.
Is you GEN light on? You haven't replaced that bulb with an LED, have you? OP said he replaced the voltage regulator so now it's time for some additional troubleshooting. http://www.914world.com/bbs2/index.php?s=&...t&p=2600844 https://www.pelicanparts.com/techarticles/9...mments_Bookmark |
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Posts in this topic
SKL1 Voltmeter reading? Accuracy? Jan 5 2026, 09:52 PM
mjrrti
Trying to figure out how accurate the OEM voltmet... Jan 5 2026, 11:16 PM mjrrti The brand didn’t show in my pic but it is zeehoo... Jan 5 2026, 11:22 PM 930cabman I have found voltmeter readings somewhat erratic, ... Jan 6 2026, 05:58 AM emerygt350 It's really not the voltmeter, I checked mine ... Jan 6 2026, 06:36 AM GregAmy
Trying to figure out how accurate the OEM voltmet... Jan 6 2026, 08:15 AM SKL1 Thanks. The meter in the lighter sounds great but... Jan 6 2026, 11:47 AM SKL1 Measured voltage at the battery with a multimeter-... Jan 9 2026, 05:47 PM
Spoke
Measured voltage at the battery with a multimeter... Jan 10 2026, 09:28 PM 930cabman
[quote name='SKL1' post='3240206' date='Jan 9 202... Jan 11 2026, 07:33 AM Superhawk996 1) Means your battery isn’t charging.
2) Means ... Jan 9 2026, 05:50 PM emerygt350 It means either the alternator is shot or your vol... Jan 9 2026, 06:09 PM |
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