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Home >> Geo >> 1996 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Circuit Tests >> Circuit Test B2-1 - Inoperative Malfunction Indicator Light >> Circuit Description
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Circuit Description

Malfunction Indicator Light (MIL) should remain on when ignition is on and engine is not running. Battery voltage is applied to indicator bulb. PCM controls indicator bulb and turns it on by providing a ground path through Red/Yellow wire to PCM.

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