Ignition Control Module

Ensure coil and power source are okay before checking Ignition Control Module (ICM). Disconnect ICM connector. Install Ignitor Checker (49 F018 002) and Adapter Harness (49 N018 001). Connect the ignitor checker and adapter between the ICM and wiring harness, and connect the power leads to the battery.
Turn ignition on. Disconnect the high-tension coil lead from the distributor and hold it about 1/4" from ground. Set selector switch on igniter checker to T1. Turn SW2 on and off, and verify a strong blue spark is discharged from lead. If spark is weak in color, replace the coil. If no spark is present, check battery feed, main fuse, ignition switch and fusible links. Repair or replace as necessary.
CAUTION: DO NOT hold SW2 switch on longer than one second, or ICM will be damaged. Ensure ohmmeter is installed with (+) lead to ground and (-) lead to single-pin wire of test harness. DO NOT reverse leads, or damage may result.
Turn ignition on. Using a analog voltmeter, check voltage on Black wire of adapter harness. Turn switch SW2 on and off. Verify voltmeter fluctuates. If voltmeter does not fluctuate, replace ICM and retest.