Well,this is my interpretation of getting a tacho working on my Sierra.
Here's the two diodes wired up
the wires on the bottom end of the diodes are leading to the coilpack plug wiring green/red and yellow/green
the wire on the top end of the diodes lead to the zener
and I've cut out a bit wire insulator from the green wire leading from the tacho.
So,that's with the zener,and now I've tried it without the zener
and it still doesn't work,am I going wrong somewhere? thanks
Two diodes and one zener
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