DTC C1295 Brake Lamp Switch Circuit Open. Cadillac DeVille 2000

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2000 🢒 DeVille 🢒 DTC 🢒 DTC C1295 Brake Lamp Switch Circuit Open

ABS Components
PWR, GND, Stoplamp Switch, Solenoid Valves, and Pump Motor
Handling ESD Sensitive Parts Notice
Rear Fuse Block Battery Voltage
Cruise Control Module PCM Inputs and Vehicle Speed Input
RH Tail Lamp
RH Tail Lamp
RH Tail Lamp
Tail Lamps

Circuit Description

The electronic brake control module (EBCM) sources 5 volts on the stop lamp switch signal circuit when the stop lamp switch is inactive. The voltage is supplied a ground path through the stop lamp bulbs.

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

The stop lamp switch input voltage is between 2.1 volts and 5.3 volts for 2 seconds.

Action Taken When the DTC Sets

•	The EBCM disables the TCS for the duration of the ignition cycle.

•	The TRACTION CONTROL indicator turns ON.

•	The ABS remains functional.

Conditions for Clearing the DTC

•	The condition for the DTC is no longer present and the DTC is cleared with a scan tool.

•	The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Test Description

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

This DTC detects an open stop lamp switch signal circuit from the stop lamp side of the splice pack to the EBCM.

Verifies that the stop lamps are operating properly.

Step

Action

Yes

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

Press the brake pedal.
With the scan tool, observe the Brake Switch - ABS Input parameter in the DRP/ABS/TCS (if equipped) data list.

Does the Brake Switch - ABS Input parameter display Applied?

Go to Step 4

Go to Step 3

Test the signal circuit of the stop lamp/auto trans shift lock control switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Press the brake pedal.

Are all of the stop lamps ON?

Go to Step 5

Go to Stop Lamps Inoperative

Replace the high mounted stop lamp Refer to High Mount Stop Lamp Replacement in Light Systems.

Did you complete the replacement?

Go to Step 8

Inspect for poor connections at the harness connector of the EBCM. 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 8

Go to Step 7

Important: Perform the setup procedure for the EBCM. An unprogrammed EBCM will result in the following conditions:

•	Inoperative or poorly functioning DRP/ABS/TCS/VSES/VES (if equipped)

•	Set DTC C1248 EBCM Turned the Red Brake Warning Indicator On

•	Set DTC C1255m3 EBCM Internal Malfunction

Replace the EBCM. Refer to Electronic Brake Control Module Replacement .

Did you complete the replacement?

Go to Step 8

Use the scan tool in order to clear the DTCs.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK