I am having a shop look at the tachometer, and they want to know which wires are which color. Does anyone have the breakdown for: Power, Signal and Ground? or Where I can find a wiring diagram on line?
Which car do you have? Remember on the 328 the tachometer is actually a 4 cyl tach. There is a write up here on how to fix it yourself if it is reading the incorrect RPM. The problem is a rheostat that is inside the tach. Took me longer to get the tach out than to fix it.
I saw the write up. The tach is at a shop that has a square wave generator, but they want to make sure they connect the correct wires.
http://ferrari.cdyn.com/ferrari_docs/328_wiring.pdf is the location for the wiring diagrams. or http://ferrari.cdyn.com/ for all the info.
Do check this but if my memory is right Black = Negative Brown stripped black = Signal Green stripped white = Positive Check these before doing anything.
