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Home >> GMC Truck >> 1999 >> S15/T15 Sonoma P/U 2WD L4-2.2L VIN 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Body Control Module >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions >> Input 2 >> Courtesy Lamp Relay

Courtesy Lamp Relay

Range: ON/OFF
The BCM uses the courtesy lamp relay input in order to determine the state of the courtesy lamp relay. ON displays when the BCM commands the courtesy lamps to turn ON by providing a ground for the courtesy lamp relay coil.

OFF displays when the BCM is not commanding the courtesy lamps to turn ON by not providing a ground for the courtesy lamp relay coil.
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