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Home >> Chevrolet >> 2002 >> Chevy Express G2500, Van Cargo Extended, 5.0 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Fuel System (Diesel) >> Ignition (Glow Plug) Relay (6.6L) >> Circuit Description
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Circuit Description

The ignition relay supplies ignition voltage to glow plugs, Fuel Injection Control Module (FICM), Engine Control Module (ECM), fuel rail pressure regulator, Mass Air Flow (MAF) sensor, fuel heater, A/C compressor relay, Daytime Running Lights (DRL) and rear defogger.