Hello,
There are a couple things that come to mind first is the push rod that from the booster needs to be adjusted inward, when the brake are locked loosen the master cylinder mounting bolts if the brakes start rolling you know the push rod is the problem next we should run the codes becasue it sounds like the ABS/traction control module is going out. Lets run the codes to confirm the issue
https://youtu.be/rTtAnsOlZU4
If the module is to blame this video with show you how to replace it with instruction and diagram below to help show you on your truck.
https://youtu.be/lUotkKXG9dY
ABS traction control module replacement reprogramming.
Note:
DO NOT program a control module unless directed to by a service procedure or a service bulletin. If the control module is not properly configured with the correct calibration software, the control module will not control all of the vehicle features properly.
Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. When required install the EL-49642 - SPS Programming Support Tool to maintain system voltage. If not available, connect a fully charged 12?V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc.
During the programming procedure, follow the SPS prompts for the correct ignition switch position.
Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection-Maintenance (I-M) system status indicators to NO.
Reference Information
Special Tools
EL-49642 - SPS Programming Support Tool
Replace and Program Control Module or Reprogram Control Module
To program a replacement or an existing control module, perform the following procedure:
Install EL-49642 - SPS Programming Support Tool .
Access the Service Programming System (SPS) and follow the on-screen instructions.
On the SPS Supported Controllers screen, select K17?Electronic Brake Control Module - Programming and follow the on-screen instructions.
On the SPS Supported Controllers screen, select K17?Electronic Brake Control Module - Configuration and Setup while following the on-screen instructions.
At the end of programming, choose the “Clear All DTCs” function on the SPS screen.
Unsuccessful Programming Recovery
In the event of an interrupted or unsuccessful programming event, perform the following steps:
Ignition ON. Ensure the control module, DLC and programming tool connections are secure and the SPS software is up to date.
Verify the control module can be reprogrammed.
If the control module cannot be reprogrammed
Ignition OFF for one minute, ignition ON.
Verify the control module can be reprogrammed.
If the control module cannot be reprogrammed, replace the control module.
If the control module can be reprogrammed.
All OK.
If the control module can be reprogrammed
All OK.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for Control Module replacement, programming and setup
Like JACOBANDNICKOLAS said it could be a bearing hub going out causing the wheel speed sensor to have a false reading.
https://youtu.be/ZgiPRG6jffc
Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Monday, February 22nd, 2021 AT 11:35 AM
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