Park Brake Will Not Hold. Cadillac DeVille 2003

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2003 🢒 DeVille 🢒 Brakes 🢒 Park Brake 🢒 Park Brake Will Not Hold

Test Description

The numbers below refer to the step numbers on the diagnostic table.

Listen for an audible click when the park brake relay A operates. Command both the ON and OFF states. Repeat the commands as necessary.

Listen for an audible click when the park brake relay B operates. Command both the ON and OFF states. Repeat the commands as necessary.

Step	Action	Yes	No
Schematic Reference: Park Brake System Schematics
1	Did you perform the Park Brake Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Park Brake
2	Turn OFF the ignition. Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, command the park brake relay A ON and OFF. Does the park brake relay A turn ON and OFF with each command?	Go to Step 3	Go to Step 4
3	With a scan tool, command the park brake relay B ON and OFF. Does the park brake relay B turn ON and OFF with each command?	Go to Step 6	Go to Step 5
4	Turn OFF the ignition. Disconnect the rear integration module (RIM). Turn ON the ignition, with the engine OFF. Attempt to set the park brake. Does the park brake set?	Go to Step 11	Go to Step 8
5	Turn OFF the ignition. Disconnect the rear integration module (RIM). Turn ON the ignition, with the engine OFF. Attempt to set the park brake. Does the park brake set?	Go to Step 11	Go to Step 9
6	Test the supply voltage circuit of the park brake relay A for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 7
7	Test the supply voltage circuit of the park brake relay B for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 10
8	Test the control circuit of the park brake relay A for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 15
9	Test the control circuit of the park brake relay B for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 16
10	Inspect for poor connections at the harness connector of the park brake release solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 12
11	Inspect for poor connections at the harness connector of the rear integration module (RIM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 19	Go to Step 18
12	Inspect the park brake system for proper operation. Refer to Park Brake System Diagnosis . Did you find and correct the condition?	Go to Step 19	Go to Step 13
13	Inspect the disc brake system for proper operation. Refer to Disc Brake System Diagnosis in Hydraulic Brakes. Did you find and correct the condition?	Go to Step 19	Go to Step 14
14	Inspect the hydraulic brake system for proper operation. Refer to Hydraulic Brake System Diagnosis in Hydraulic Brakes. Did you find and correct the condition?	Go to Step 19	Go to Step 17
15	Replace the park brake relay A. Did you complete the replacement?	Go to Step 19	--
16	Replace the park brake relay B. Did you complete the replacement?	Go to Step 19	--
17	Replace the park brake release solenoid. Refer to Park Brake Release Solenoid Replacement . Did you complete the replacement?	Go to Step 19	--
18	Replace the rear integration module (RIM). Refer to Rear Integration Body Control Module Replacement in Body Control System. Did you complete the replacement?	Go to Step 19	--
19	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2