I've heard about the mod where you install a switch and a dash light to show when the secondaries are open. I'd like some more details from anyone who has done this.

I'm thinking about doing the circuit with a normally closed plunger switch contacting the cam when the secondaries are in the closed position. When they open and come off the switch the light comes on, sort of like a door interior light switch. I will wire it through a fused circuit that is only hot with the ignition on.

Anyone have any pics of their switch and how you have it attached as well as the dash light? Where did you buy the switch and light from? Thanks.