Aftermarket gauge wiring

[Sonny]

I currently have an electric water temp gauge, volt meter, and carb choke sharing same 12v power From fuse box terminal. I want to add a tach. Can I run all 4 on same 12v source? I currently have power wires “pig tailed”. Should they be in series? 1970 Belvedere.

 

[Frank Mopar]

I would.

 

[Nacho-RT74]

Why the carb choke? Carb choke should be on RUN circuit from blue wire ( ballast, reg, alt field ) on engine harness.

Gauges load is really minimal, so shouldn't be a problem. Pigtailed or "series"... I guess you meant running the 12 volts source from one to the other. That's not a problem. There is several ways to make it depending on gauges location. If all together is just about run one wire from fuse box up to gauges location and splice all together at the end of this wire close to gauges.