Brake light wont go off need help
Thread Starter
Intermediate
Joined: Nov 2014
Posts: 27
Likes: 1
Brake light wont go off need help
Brake light stays on code is c1247. All started when tried to adjust e-brake this is when light came on. Had to put on new e- brake shoes also put on new rotors and pads. Pressure bleed all brake lines, new fluid Thought this might solve problem. Light still on, you can unplug from module on left inside fender and light will go off was told this meant brake module was working. Brakes and e-brake all work great. Any suggestions.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
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From: Columbia SC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Try pulling UP on the brake peddle and see if the light goes out. You could have a misadjusted switch or it could have gone bad.
The reduced power could be anything related to the Throttle body and the Throttle Position Switch.
When it in reduced power, read the DTC with the engine ON and in that mode/
BC
The reduced power could be anything related to the Throttle body and the Throttle Position Switch.
When it in reduced power, read the DTC with the engine ON and in that mode/
BC
Drifting
Joined: Sep 2009
Posts: 1,719
Likes: 4
From: cinnaminson n.j.
St. Jude Donor '14
The C1247 comes from the brake pressure differential switch/circuit. See below, it should help.
Circuit Description
The EBCM monitors the Brake Pressure Differential Switch to turn off Traction Control and Active Handling if a pressure loss is detected in the hydraulic brake system.
Conditions for Setting the DTC
DTC C1247 can be set anytime, if the EBCM detects the Brake Pressure Differential Switch has been grounded due to loss of brake pressure or a short to ground.
Action Taken When the DTC Sets
TCS/Active Handling are disabled.
Indicators that turn on:
RED Brake Warning indicator
Car Icon (TCS indicator)
Messages displayed on the DTC:
Service Traction System
Service Active HNDLG
Conditions for Clearing the DTC
Condition for DTC is no longer present and scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
Diagnostic Aids
DTC C1247 could be set during a hydraulic brake system bleeding procedure if the ignition switch is in the ON position.
It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
If an intermittent malfunction exists refer to Intermittent and Poor Connections in Diagrams, Diagnostic Aids.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
This step checks for a short to ground in the Brake Pressure Differential Switch circuit.
This step indicates that the Brake Pressure Differential Switch circuit is operating properly, and the cause of the DTC is a failure in the hydraulic brake system.
Circuit Description
The EBCM monitors the Brake Pressure Differential Switch to turn off Traction Control and Active Handling if a pressure loss is detected in the hydraulic brake system.
Conditions for Setting the DTC
DTC C1247 can be set anytime, if the EBCM detects the Brake Pressure Differential Switch has been grounded due to loss of brake pressure or a short to ground.
Action Taken When the DTC Sets
TCS/Active Handling are disabled.
Indicators that turn on:
RED Brake Warning indicator
Car Icon (TCS indicator)
Messages displayed on the DTC:
Service Traction System
Service Active HNDLG
Conditions for Clearing the DTC
Condition for DTC is no longer present and scan tool clear DTC function is used.
Fifty ignition cycles have passed with no DTCs detected.
Diagnostic Aids
DTC C1247 could be set during a hydraulic brake system bleeding procedure if the ignition switch is in the ON position.
It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
If an intermittent malfunction exists refer to Intermittent and Poor Connections in Diagrams, Diagnostic Aids.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
This step checks for a short to ground in the Brake Pressure Differential Switch circuit.
This step indicates that the Brake Pressure Differential Switch circuit is operating properly, and the cause of the DTC is a failure in the hydraulic brake system.
