Ignition Coil Test

With ignition off, check secondary resistance between pin No. 4 and coil tower. Reading should be 7000-13, 000 ohms. Check primary resistance between pins No. 1 and 4. Reading should be 3-4 ohms. If readings are not as indicated, replace coil.

Fig 1: Typical Solid State Ignition (SSI) Wiring Schematic (Wire Colors & Number Of Pins Used May Vary)

Courtesy of FORD MOTOR CO.