Does anyone know how to wire in a standard megajolt shift light, the basic round type with green and red L.E.D's. There are 3 wires from the back of the light green red and white. I need to know which go's to the MJ unit and where the other two go, i seem to think the 2 wires that dont go to the MJ unit go to +12v via different size resistors....

You need to check the autosportslabs web site, I think the megajolt switches to earth.
The shift light function only switches the red at rev limit but you can configure the other outputs to switch green and yellow at pre determined revs.

Theres 4 auxiliary outputs which are earth switches. Apply voltage to the led and run each one to separate outputs setting the rpm on each one to the desired point.