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Home >> Chevrolet >> 2017 >> City Express LS >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information And Procedures >> Security Indicator Malfunction >> Circuit/System Description

Circuit/System Description

The Body Control Module (BCM) provides a switched ground for the security indicator circuit. When the BCM arms the vehicle immobilizer it closes the switch to illuminate the security indicator. B+ is supplied to the indicator through a fuse in the instrument panel fuse block. The fuse also supplies B+ to the instrument cluster.

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