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- - Volt meter question (https://67-72chevytrucks.com/vboard/showthread.php?t=834661)

Denver9

05-19-2022 09:27 PM

Volt meter question

I have a 74 Chevy C20 pickup. The Volt meter doesn't work while installed in the truck. However it works perfect out of the vehicle when measuring battery voltage. There are only 2 plug-in points for it in the instrument cluster but the gage has 3 terminals. What is the purpose of the third terminal? I am confused.
- Denver

mongocanfly

05-19-2022 10:57 PM

Re: Volt meter question

1 Attachment(s)

Like this?

Prong

05-20-2022 05:26 AM

Re: Volt meter question

Has the wiring been changed to accommodate the volt gauge? 73-75 trucks came with an ammeter gauge which is wired differently.

truckin 79

05-20-2022 11:28 AM

Re: Volt meter question

I will second what prong said earlier trucks had ammeter gauges not volt meter gauges.

jocko

05-21-2022 11:20 PM

Re: Volt meter question

this thread might help, especially post #9 and also Hatzie's wiring diagram links in his signature. http://67-72chevytrucks.com/vboard/s...d.php?t=643942
As noted above, if you truly have a GM voltmeter in your 74, it's a 76+ gauge.

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