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Home >> Chevrolet >> 2002 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - System & Component Testing >> Ignition System >> Ignition Relay Diagnosis (5.7L Bi-Fuel) >> Circuit Description
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Circuit Description

The ignition relay is the positive voltage supply source for the following components:

The ignition relay coil is energized when ignition switch is turned to RUN or START positions. The ignition relay switch contact is supplied voltage at all times.