Shift Light, How-To Options

[Defgeph]

OK here goes.

I hooked mine up to a 3sgteRC.
Not sure if the 7a and 5s are the same.

The unit has three wires. Black, Red, Green(in mycase)

Black goes to ground. The red goes to positve, like the cig lighter.
Green or signal wire connects to the solid black wire on your ignitor in the engine bay.

After ur done you should have something like this


The end

DEF

[Coomer]

The signal wire does go to your RPM signal(tach) wire, which can be tested for with a multimeter.

To ensure that you're finding the right wire, set your multimeter in AC mode and probe wires while revving the engine. The RPM signal wire gives a low voltage that rises(but still stays under 10 volts I think...can't remember for sure though) as the RPM rises.