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Home >> GMC >> 1990 >> Forward Control 6.2 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Basic Ignition System Checks (Gasoline) >> Ignition Coil Power Source

Ignition Coil Power Source

  1. Turn ignition on. Using voltmeter, check voltage between terminal "B" of ignition coil and ground on models with remotely mounted ignition coil.
  2. On models equipped with integrally mounted ignition coil, check voltage between BAT terminal and ground at distributor. Battery voltage should exist. If not, check for open circuit, blown ignition fuse or defective ignition switch.
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