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Old Aug 2, 2021 | 11:05 AM
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Default change to voltmeter
I added a 150 amp alternator.....the ammeter had a black and white wire and a black wire......which should I use for my ground?
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Old Aug 2, 2021 | 11:59 AM
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Both the black and the black/white are POSITIVE pick one and tape off the other and supply a separate ground.
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Old Aug 2, 2021 | 12:25 PM
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Originally Posted by Peterbuilt
Both the black and the black/white are POSITIVE pick one and tape off the other and supply a separate ground.

If you use the black/white wires- the voltmeter will stay on all the time- possibly draining the battery.

You'll want to use the PINK wire - used on the Fuel and temp gauges- voltmeter will only be on during ignition.

For the ground - the back of the cluster will work
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Old Aug 2, 2021 | 02:27 PM
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Originally Posted by Richard454
If you use the black/white wires- the voltmeter will stay on all the time- possibly draining the battery.

You'll want to use the PINK wire - used on the Fuel and temp gauges- voltmeter will only be on during ignition.

For the ground - the back of the cluster will work
That's how I did mine. For 68 beginner, see post #5 of this thread - https://www.corvetteforum.com/forums...in-a-68-a.html. The wiring instructions come in the box with the gauge.
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Old Aug 2, 2021 | 05:30 PM
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I'll be ditching my ammeter when I go to electric fans. Does anyone make a stock looking voltmeter with the green letters/numbers? My '71 has the green gauges.
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Old Aug 2, 2021 | 07:45 PM
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Originally Posted by theandies
I'll be ditching my ammeter when I go to electric fans. Does anyone make a stock looking voltmeter with the green letters/numbers? My '71 has the green gauges.
I got mine from Zip.


https://www.zip-corvette.com/68-71-v...xoCvy8QAvD_BwE
Last edited by 69ttop502; Aug 2, 2021 at 07:47 PM.
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Old Aug 2, 2021 | 08:28 PM
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Originally Posted by theandies
I'll be ditching my ammeter when I go to electric fans. Does anyone make a stock looking voltmeter with the green letters/numbers? My '71 has the green gauges.
Yes, Zip........that's where I got mine.....68-71 with correct green characters......same link as noted above...https://www.zip-corvette.com/68-71-v...xoCvy8QAvD_BwE

Mine


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Old Aug 3, 2021 | 12:18 AM
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I even got an oil temp gauge to match-



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Old Aug 3, 2021 | 12:37 AM
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Did the vendor do that for you Richard? Or did you just black-out TEMP and use transfer lettering to add OIL???? Either way, it looks good....
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Old Aug 3, 2021 | 09:35 AM
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Originally Posted by 7T1vette
Did the vendor do that for you Richard? Or did you just black-out TEMP and use transfer lettering to add OIL???? Either way, it looks good....
It's an 81-82 gauge with the 71 face - Corvette Instrument Service did it for me. Using it on the dry sump tank.
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Old Aug 3, 2021 | 01:07 PM
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