That was a cigarette lighter USB power adapter. You can find those on Amazon all day long.

https://www.amazon.com/gp/product/B01M9IKYVH

It's just measuring the voltage at the cigarette lighter. That should be the same voltage as the battery/alternator. It has no interaction with the ammeter.

The only caveat about that modification is that it will affect the stock wiring for the fuel pump since you will not have a neutral wire from the alternator. If you have rewired the fuel pump circuit, then it's no problem. When I did the fuel injection on my 260Z, I no longer controlled the fuel pump with the neutral from the alternator, so it was a no-brainer for me.

4 minutes ago, SteveJ said:

That was a cigarette lighter USB power adapter. You can find those on Amazon all day long.

https://www.amazon.com/gp/product/B01M9IKYVH

It's just measuring the voltage at the cigarette lighter. That should be the same voltage as the battery/alternator. It has no interaction with the ammeter.

The only caveat about that modification is that it will affect the stock wiring for the fuel pump since you will not have a neutral wire from the alternator. If you have rewired the fuel pump circuit, then it's no problem. When I did the fuel injection on my 260Z, I no longer controlled the fuel pump with the neutral from the alternator, so it was a no-brainer for me.

ok thats what that was thanks