Originally Posted by
djmca
Not sure how people have made this work, would be intersted to find out
By following the diagram
It definitely works, I've used it on several cars.
2x 1N4004
1x 1N4744 (Zener)
The only reason it would missfire is if one or more of the diodes were the wrong way round.
Like this, but without the big blue pullup resistor:
All of the stripes on the diodes face each other. Green wire in the pic is connected to the 1N4744 Zener and goes off to the tacho (original bullet connector retained for ease of install, make the join near the EDIS). Tail of each 1N4004 diode go to one coil each (piggyback one to the cable on pin 10 of the EDIS and one to pin 12). Ignore the blue pullup resistor it's not required.
Lee
