Start Circuit
- Connect Spark Tester (D81P-6666-A) between ignition coil wire and a good engine ground. Crank engine using vehicle's ignition switch. If no sparks occur at tester gap, proceed to step 2). If sparks occur at tester gap, proceed to RUN CIRCUIT CHECK.
- If no sparks occurred in step 1), remove coil wire from distributor cap and ignition coil. Connect ohmmeter leads to both ends of coil wire, and measure resistance.
- If resistance is over 7000 ohms per foot, replace coil wire. Inspect ignition coil for damage or carbon tracking. Crank engine to verify distributor rotation and proceed to VOLTAGE SUPPLY CIRCUITS test.
Courtesy of FORD MOTOR CO.