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  1. Wiring a tach - How do I make it dim?

    Electrical Systems
    Hello, I am new to the forum. I recently installed a tachometer in my 1977 Elco, but I want to wire it into the dimmer switch. I don't know the correct terminology for it, but I want to wire my tach so that the back light comes on and DIMS with the other gauges. The tach has a red...