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Home >> GMC >> 1999 >> Yukon Base, 4WD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Remote Keyless Entry Systems >> Description & Operation (Standard Keyless Entry System) >> Standard Keyless Entry System Circuit Description >> Door Lock Verification
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Door Lock Verification

When the door lock button is depressed, all doors will lock, and also the remote control door lock receiver will provide a ground signal through CKT 28 (BLK) to the horn relay which will sound the horn. See WIRING DIAGRAMS  . This feature can be turned ON or OFF when programming the remote control door lock receiver. See TRANSMITTER  under PROGRAMMING.