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Home >> Chevrolet >> 2002 >> TrailBlazer 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Ignition System >> Ignition Relay Diagnosis (8.1L) >> Circuit Description
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Circuit Description

Ignition relay supplies ignition voltage to fuel injectors, ignition coils, Powertrain Control Module (PCM) and Throttle Actuator Control (TAC) module.

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