LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1971 >> P-100 >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition Systems - Solid State Ignition >> Testing >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ignition Systems - Solid State Ignition: Testing: Notes

CAUTION: Do not use volt-amp test procedure or any test equipment that utilizes a knife switch on battery terminal. Only test procedures as outlined in this section are to be used.

If the ignition system is suspected of a malfunction, inspect for loose connections and tighten as necessary, then check secondary ignition circuit as follows:

  1. Remove coil high tension lead from distributor cap and turn ignition switch on. Hold high tension lead 3/16" from a good ground and crank engine. If spark is good then trouble is in secondary circuit.
  2. If no spark is observed, ensure that high tension lead is good. If high tension lead is good, disconnect the 3-way and 4-way connectors at electronic module and test (see test procedure tables) system at harness connectors.
    NOTE: Do not make tests at module terminals.

    If all of the following tests comply with specifications, replace electronic module.

    Fig 1: HARNESS CONNECTOR PINS
    G09325457Courtesy of FORD MOTOR CO.