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Home >> GMC >> 1987 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Engine Controls - Basic Testing - Gasoline) >> C-4, Basic Ignition System Checks >> HEI-Est Distributor >> Ignition Coil Power Source
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Ignition Coil Power Source

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Rally Camper Special, 1994 GMC Rally, and 1994 GMC Forward Control. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition on. Use voltmeter to check voltage between terminal "B" of ignition coil and ground. If battery voltage does not exist, check for open circuit, blown ignition fuse or defective ignition switch.

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