I am really stumped with my new rally pack clock. I have a unit from California Mustang for my 1965 Mustang and I was able to connect the tach after a number of tries. The clock has me COMPLETELY stumped since the light will not work and the clock ticks only when the car lights are on. Can anyone help me on this? I am really frustrated and have received NO help from either California Mustang or the manufacturer Oval Industries!