Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK1994ROADMASTER ESTATE WAGON V8-350 5.7LREPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSCOMPONENT DIAGNOSTIC TESTS9K-10 DOORS DO NOT AUTOMATICALLY LOCK W/DOORS CLOSED
1994 Buick Roadmaster Estate Wagon V8-350 5.7L
9K-10 Doors Do Not Automatically Lock W/Doors Closed
1994 Buick Roadmaster Estate Wagon V8-350 5.7LSECTION 9K-10 Doors Do Not Automatically Lock W/Doors Closed
CIRCUIT DESCRIPTION
When the RCDLR senses voltage on CKT 639 (ignition switch in "RUN"), "NO" voltage on CKT 275 and the ground removed from CKT 156 (all doorjamb switches open, all doors closed), the RCDLR applies voltage to CKT 195. The door lock relay is energized to activate the door lock actuators and lock all doors.
CHART TEST DESCRIPTION Number(s) below refer to circled number(s) on the diagnostic chart.
1. Isolate a power door lock system fault or keyless entry system fault.
2. Isolate a keyless entry system functional failure.
3. If the courtesy lamp function operates normally, CKT 156 to the RCDLR is not shorted to ground.
4. Checks for unwanted voltage at terminal "C" of the "C2" connector when transmission is in drive.
5. Checks for voltage input at terminal "C" of "C2" connector with transmission in "PARK."
DIAGNOSTIC AIDS Terminal "B" of "C2" connector must have voltage to it with key "ON," for automatic lock function to work.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.