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Home >> Chevrolet >> 1999 >> Forward Control P12 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - Basic Diagnostic Procedures) >> Basic Ignition System Checks >> Dis (Except 3.4L) >> Ignition Coil Power Source
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Ignition Coil Power Source

WARNING: This page is about a different variant/trim than selected.
CAUTION: DO NOT insert DVOM leads into ignition coil connectors. Connector terminals may be damaged. When using DVOM, ensure lead contacts front edge of terminals only.

Turn ignition on. Check ignition positive voltage circuit of ignition control module for battery voltage. See appropriate wiring diagram in WIRING DIAGRAMS article. If battery voltage is not present, check fuse for ignition control module circuit. If fuse is not open, check for open in circuit between fuse and ignition control module.