Tach wiring issue

[DavidM]

Weird. I know on the 240 the signal that feeds the tach is the same signal that feeds the coil. The stock tach on my 240 went bye-bye before Barber so I was just looking at the wiring diagrams to put in another one.

I haven't looked at the diagrams for the 300 to see if it's the same deal. I'd think the car wouldn't run if that was the case, though, if you're not seeing anything on that wire.

Good luck.

David

[Tristan Smith]

The ZX has a coil on plug set up with a power transistor unit. It get's trigered by the crank angle sensor. The ecu (I believe) then sends that signal on a seperate wire to the tach (the yellow and red one just like the 240sx). The car runs fine, but so signal at that wire.