MOTORCRAFT DURA-Spark II Ignition System: Testing: Notes

NOTE: All wire colors shown refer to colors of electronic control module wires. For example, "the Green wire leading to the coil" would refer to any colored wire leading to the coil, that connects to the module's Green wire. Therefore, when making tests, wires must be traced back to control module for proper color identification. Also, when a test is completed and a problem is found, make the necessary repair and repeat the failed test to be sure that the problem has been corrected.

When checking the secondary voltage, do not remove the following spark plug wires while the engine is running or cranking:

Plug No. 1 or 8 on V8 engines.
Plug No. 3 or 5 on 6 Cylinder engines.
Plug No. 1 or 3 on 4 Cylinder engines.