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dannichols1474 dannichols1474 is online now
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Join Date: Sep 2019
Location: Milpitas, CA
Posts: 278
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Hi Nick,

Looking good!

For the shielded twisted pair (black and white wires in grounded sheath), connect the white wire (pin 24, TACH IN) to the black signal wire from the Pertronix igniter. Leave the black wire (pin 1) disconnected. The wire sheath is already grounded at the ECU.

Connect 12V switched to the red, power-in wire from the Pertronix igniter and make sure you put a 1k ohm pull up resistor between the 12V switched power and the TACH IN signal wire so you get a good high/low/high... signal from the Pertronix to the ECU.
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Dan
1975 911 Carrera

"CIS to ITB EFI conversion" thread
Updated (2) Table of Contents pg17 post 339
Old 04-02-2024, 06:36 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #121 (permalink)