The brake switch indicates brake pedal status to the control solenoid (w/body and TCM) valve assembly. The normally-open brake switch supplies ignition voltage to the TCM. Applying the brake pedal closes the switch, suplying voltage to the TCM. Releasing the brake pedal interrupts voltage to the TCM.

P0719

P0724

P0719

DTC P0719 sets if the TCM detects an open brake switch or circuit and the following conditions occur eight times:

P0724

DTC P0724 sets if the TCM detects a closed brake switch or circuit, 12 volts, for 15 minutes during vehicle acceleration and the following conditions occur eight times:

DTCs P0719 and P0724 are Type C DTCs.

DTCs P0719 and P0724 are Type C DTCs.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Start the engine. With the vehicle in Park, observe the Brake Switch parameter on the scan tool. The Brake Switch parameter should display Released with the brake pedal released. Apply the brake pedal and the Brake Switch parameter should display Applied.

1. Install a scan tool. Turn ON the ignition, leaving the engine OFF. Observe the Brake Switch parameter. The parameter should display Released.

⇒	If the scan tool displays Applied, disconnect the stop lamp switch connector.

2. Observe the Brake Switch parameter on the scan tool with the stop lamp switch connector disconnected. The parameter should display Applied.

⇒	If the scan tool displays Released after the stop lamp switch connector disconnected, test the stop lamp switch.

⇒	If the scan tool displays Applied after the stop lamp switch connector is disconnected, test the stop lamp switch signal circuit for a short to voltage.

3. While observing the brake switch parameter on the scan tool, use a terminal test kit and install a fused jumper wire between the stop lamp voltage circuit and the stop lamp switch signal circuit. The brake switch parameter should change from Released to Applied when the fused jumper wire is installed.

⇒	If the brake switch parameter changes, replace the stop lamp switch.

4. Inspect the stop lamp fuse; refer to Circuit Protection - Fuses. The fuse should not be blown.

⇒	If the fuse is blown, test the voltage circuit and the stop lamp switch signal circuit for a short to ground.

5. Using a DMM, measure the voltage between the voltage circuit and ground at the stop lamp switch connector. The voltage should be near 12 volts.

⇒	If the voltage is not near the specified voltage, test the voltage circuit for an open or high resistance.

6. Using a terminal test kit measure the resistance of the stop lamp switch signal circuit between the TCM and the stop lamp switch. The resistance should be less than 10 ohms.

⇒	If the resistance is greater than 10 ohms, test the stop lamp switch signal circuit for an open or high resistance.

⇒	If all circuits and connections test normal, replace the control solenoid (w/body and TCM) valve assembly.

With the stop lamp switch removed, use a DMM to measure resistance across the pins of the voltage circuit and the stop lamp switch signal circuit. With the stop lamp switch plunger released, the DMM resistance should display infinite resistance. With the stop lamp plunger depressed the stop lamp switch resistance should be less than 10 ohms.

Perform the Diagnostic Repair Verification after completing the repair.