TECH: Switch for Reverse Indiglo Gauges

I have installed my new Reverse Indiglos on a 12v switch so I can leave them on even when the car is off for show etc.
I had my old standard indiglo's wired to the parking lights so they automatically came on.

Is there a way that I can have them ALWAYS come on with the parking lights, but still be able to flip my switch and juice them up when the car's off?

I was thinking of running a wire to the 12v for the gauges -from the parking lights (+) after the switch. But MY CONCERN is that power will back feed into the parking lights circuit when the car is off and the gauges are on. Should I be using a RESISTOR or RELAY in some capacity?

any regular 12v relay should work just fine.

Yeah just put a relay in, this should work!

i hooked mine up to my dimmer switch. can still dim lights and its still same strength indiglo

Originally posted by j.fuggi
i hooked mine up to my dimmer switch. can still dim lights and its still same strength indiglo

same here... but he's changed his so that they can go on even when the parking/headlights aren't on...