I've got a 1971 240Z and am upgrading to Speedhut gauges.  One of the options that is available (by special request) is additional LED lights on the tach for things like a Brake Indicator.  As my car is not together right now and I can't seem to find it in here or in manuals etc, I'd like some experienced help on how the light is triggered (by either the parking brake or fluid cylinder).

Is the current brake indicator lighted with a 12v+ or a Ground? 

Thanks in advance.  

 

There is a Red/Blue wire going to the speedometer for the Brake Warning lamp. After the light, it comes out Yellow/Blue. The Yellow/Blue wire branches off to get grounded at the Master Cylinder and Hand Brake, per the 1971 Supplement.

Thanks!

You're welcome. If you have any other questions, post away.