Pinpoint Test JB: Secondary Ignition (COP): Introduction

NOTE: A damaged ignition system may cause high catalyst temperatures. Check the components next to the catalyst and muffler for heat damage.

For 2 wire coil harness connectors, select the PCM Ignition Coil Driver Test.

For 3 wire coil harness connectors, select the Driver On Coil Ignition Test.

This pinpoint test is intended to diagnose the following:

spark plugs (12405)
secondary side of the coil
exhaust spark plug wire (12286) (6.2L engine only)

Fig 1: Identifying Coil On Plug (COP) Connector (1 Of 2)
Courtesy of FORD MOTOR CO.

Fig 2: Identifying Coil On Plug (COP) Connector (2 Of 2)

Courtesy of FORD MOTOR CO.

Vehicle	Firing Order for Coil On Plug Applications
5.0L Mustang, 6.2L F-150, F-250 - F-550	1 5 4 8 6 3 7 2
4-cylinder applications	1 3 4 2
6-cylinder applications	1 4 2 5 3 6
8-cylinder applications	1 3 7 2 6 5 4 8
10-cylinder applications	1 6 5 10 2 7 3 8 4 9