Symptoms - Hydraulic Brakes. Oldsmobile Aurora 2003

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 2003 🢒 Aurora 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Symptoms - Hydraulic Brakes

Important: The following steps must be completed before using the symptom tables.

Perform Diagnostic System Check - Hydraulic Brakes before using the brake indicator symptom tables in order to verify that all of the following are true:

•	There are no DTCs set.

•	The control module(s) can communicate via the serial data link.

Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

•	Brake Warning System Description and Operation

•	Hydraulic Brake System Description and Operation

•	Brake Assist System Description and Operation

•	Disc Brake System Description and Operation

•	Inspect for aftermarket devices which could affect the operation of the Brake Warning System. Refer to Checking Aftermarket Accessories in Wiring Systems.

•	Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

•	Inspect the master brake fluid reservoir for the proper brake fluid level. Refer to Master Cylinder Reservoir Filling .

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	Brake Warning Indicator Always On

•	Brake Warning Indicator Inoperative

•	Brake Pulsation

•	Brake System Noise

•	Braking Action Uneven - Pulls to One Side

•	Braking Action Uneven - Front to Rear

•	Brake Pedal Excessive Travel

•	Brake Pedal Excessive Effort

•	Brakes Drag

•	Brake System Slow Release

•	Brake Fluid Loss