Wiring Diagram Cluster

1991 Buick Roadmaster Transmission Wiring Diagram

Find transmission control module wiring, shift solenoid circuits, speed sensor paths, and torque converter clutch schematics.

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Matched Diagrams

48

Variant Used

Roadmaster Estate Wagon V8-305 5.0L

Total Vehicle Diagrams

664

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Transmission Fluid Change1991 Buick Roadmaster How to Find Technical Service Bulletins by Category/Symptom

Likely fix path

Exact Repair Guides

These repair flows most often intersect with transmission diagnosis on this exact vehicle.

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Diagnostic signal

Codes Often Seen With This System

Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.

C0035: Left Front Wheel Speed Sensor Circuit →
C0040: Right Front Wheel Speed Sensor CircuitC0050: Right Rear Wheel Speed Sensor CircuitC0236: Rear Wheel Speed Sensor Signal Erratic

Top Transmission Diagram Paths

1.Automatic Transmission/Transaxle — Fluid Diagrams > D-4 > D-4 - First GearTransmission and DrivetrainOpen2.Automatic Transmission/Transaxle — Fluid Diagrams > D-4 > D-4 - Second GearTransmission and DrivetrainOpen3.Automatic Transmission/Transaxle — Fluid Diagrams > D-4 > D-4 - Third Gear (Converter Clutch Applied)Transmission and DrivetrainOpen4.Automatic Transmission/Transaxle — Fluid Diagrams > Detent Downshifts (Valves In Second Gear Position)Transmission and DrivetrainOpen5.Automatic Transmission/Transaxle — Fluid Diagrams > Part Throttle 4-3 & Modulated Downshifts (Valves In 3rd Gear)Transmission and DrivetrainOpen6.Automatic Transmission/Transaxle — Diagnostic Aids > Pull-to-Seat ConnectorsTransmission and DrivetrainOpen7.Automatic Transmission/Transaxle — Diagnostic Aids > Push-to-Seat ConnectorsTransmission and DrivetrainOpen8.Automatic Transmission/Transaxle — Diagram Information and Instructions > Cell ReferencesTransmission and DrivetrainOpen9.Automatic Transmission/Transaxle — Diagram Information and Instructions > Schematic SymbolsTransmission and DrivetrainOpen10.Automatic Transmission/Transaxle — Diagram Information and Instructions > Wire Color Code IdentificationTransmission and DrivetrainOpen11.Automatic Transmission/Transaxle — Electrical DiagramsTransmission and DrivetrainOpen12.Automatic Transmission/Transaxle — Exploded Views > Internal ComponentsTransmission and DrivetrainOpen13.Automatic Transmission/Transaxle — Exploded Views > Unit RepairTransmission and DrivetrainOpen14.Automatic Transmission/Transaxle — Fluid Diagrams > D-4 > D-4 - OverdriveTransmission and DrivetrainOpen15.Automatic Transmission/Transaxle — Fluid Diagrams > Manual LOTransmission and DrivetrainOpen16.Automatic Transmission/Transaxle — Fluid Diagrams > Manual SecondTransmission and DrivetrainOpen17.Automatic Transmission/Transaxle — Fluid Diagrams > Manual ThirdTransmission and DrivetrainOpen18.Automatic Transmission/Transaxle — Fluid Diagrams > Neutral - Engine RunningTransmission and DrivetrainOpen19.Automatic Transmission/Transaxle — Fluid Diagrams > Park - Engine RunningTransmission and DrivetrainOpen20.Automatic Transmission/Transaxle — Fluid Diagrams > ReverseTransmission and DrivetrainOpen21.Electrical Diagrams > Transmission and Drivetrain > Automatic Transmission/TransaxleGeneralOpen22.Electrical Diagrams > Transmission and Drivetrain > Transfer CaseGeneralOpen23.Fluid Diagrams > Automatic Transmission/Transaxle > D-4 > D-4 - First GearGeneralOpen24.Fluid Diagrams > Automatic Transmission/Transaxle > D-4 > D-4 - Second GearGeneralOpen25.Fluid Diagrams > Automatic Transmission/Transaxle > D-4 > D-4 - Third Gear (Converter Clutch Applied)GeneralOpen26.Fluid Diagrams > Automatic Transmission/Transaxle > Detent Downshifts (Valves In Second Gear Position)GeneralOpen27.Fluid Diagrams > Automatic Transmission/Transaxle > Part Throttle 4-3 & Modulated Downshifts (Valves In 3rd Gear)GeneralOpen28.Components > Solenoids > Transmission Torque Converter Clutch SolenoidGeneralOpen29.Electrical Diagrams > Transmission and Drivetrain > System DiagramGeneralOpen30.Exploded Views > Automatic Transmission/Transaxle > Internal ComponentsGeneralOpen31.Exploded Views > Automatic Transmission/Transaxle > Unit RepairGeneralOpen32.Fluid Diagrams > Automatic Transmission/Transaxle > D-4 > D-4 - OverdriveGeneralOpen33.Fluid Diagrams > Automatic Transmission/Transaxle > Manual LOGeneralOpen34.Fluid Diagrams > Automatic Transmission/Transaxle > Manual SecondGeneralOpen35.Fluid Diagrams > Automatic Transmission/Transaxle > Manual ThirdGeneralOpen36.Fluid Diagrams > Automatic Transmission/Transaxle > Neutral - Engine RunningGeneralOpen37.Fluid Diagrams > Automatic Transmission/Transaxle > Park - Engine RunningGeneralOpen38.Fluid Diagrams > Automatic Transmission/Transaxle > ReverseGeneralOpen39.Diagnostic Aids > Pull-to-Seat ConnectorsTransmission and DrivetrainOpen40.Diagnostic Aids > Push-to-Seat ConnectorsTransmission and DrivetrainOpen41.Diagram Information and Instructions > Cell ReferencesTransmission and DrivetrainOpen42.Diagram Information and Instructions > Schematic SymbolsTransmission and DrivetrainOpen43.Diagram Information and Instructions > Wire Color Code IdentificationTransmission and DrivetrainOpen44.Electrical DiagramsTransmission and DrivetrainOpen45.Components > Switches > Torque Converter Clutch/Cruise Release SwitchGeneralOpen46.Components > Switches > Transmission Position SwitchGeneralOpen47.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > Malfunction Indicator Lamp > Service Engine Soon, Torque Converter Clutch & ALDL ConnectorGeneralOpen48.Electrical Diagrams > Powertrain Management > System Diagram > Service Engine Soon, Torque Converter Clutch & ALDL ConnectorGeneralOpen

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1991 Buick Roadmaster Repair HubExact Vehicle

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OEM Manual Evidence

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1991 Buick Roadmaster How to Find Technical Service Bulletins by Category/SymptomOEM Manual

How to Find Technical Service Bulletins by Category/Symptom — 1991 Buick Roadmaster Estate Wagon V8-305 5.0L Service Manual | Operation CHA...

1991 Buick Roadmaster How to Find Technical Service Bulletins by Category/SymptomOEM Manual

How to Find Technical Service Bulletins by Category/Symptom — 1991 Buick Roadmaster V8-305 5.0L Service Manual | Operation CHARM Operation...

1991 Buick Roadmaster A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Roadmaster V8-305 5.0L Service Manual | Operation CHARM Operation CHARM : Car repair ma...

1991 Buick Roadmaster A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Roadmaster Estate Wagon V8-305 5.0L Service Manual | Operation CHARM Operation CHARM :...

Repairs That Intersect This Wiring

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1991 Buick Roadmaster Transmission Fluid ChangeRepair

Open the matching repair workflow that usually intersects with transmission diagnosis on this vehicle.

Likely Trouble Codes for This System

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C0035: Left Front Wheel Speed Sensor CircuitCode

Chassis/Brakes code commonly seen during transmission diagnosis.

C0040: Right Front Wheel Speed Sensor CircuitCode

Chassis/Brakes code commonly seen during transmission diagnosis.

C0050: Right Rear Wheel Speed Sensor CircuitCode

Chassis/Brakes code commonly seen during transmission diagnosis.

C0236: Rear Wheel Speed Sensor Signal ErraticCode

Chassis/Brakes code commonly seen during transmission diagnosis.

P0500: Vehicle Speed Sensor ACode

Transmission code commonly seen during transmission diagnosis.

P0715: Input/Turbine Speed Sensor CircuitCode

Transmission code commonly seen during transmission diagnosis.

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