Ignition Coil, Distributor & Tach Signal Wiring Diagram - Fuse #7 Circuit

This document is a wiring diagram of an ignition/tachometer circuit showing how the tachometer signal is routed from the ignition system to the instrument cluster. A BRN (brown) wire runs from the TACH (instrument cluster) through a noise filter (dashed box containing a resistor and a grounded capacitor) and also feeds ECM PIN #2. A BRN-WHT (brown-white) wire connects the filter circuit to the ignition coil and distributor. Power is supplied through FUSE #7 on BLK-WHT (black-white) and via an NCA wire to the ignition coil, which also has a condenser (COND) to ground. The distributor cap is drawn with four terminals numbered 1 through 4 and an arrow indicating counterclockwise rotor rotation, with the distributor body grounded. From this diagram a reader can learn the wire colors (BRN, BRN-WHT, BLK-WHT, NCA), the fuse feeding the ignition coil (Fuse #7), the tach signal path including the RFI filter, and the ECM pin (Pin #2) that receives the ignition reference/tach signal. No year, make, model, or part numbers are stated on the visible portion; the bottom caption is cut off.