kalle1066

I recently purchased a 2007 3500 hd truck with an integrated brake controller. The trailer that I pull has electric over hydraulic disk brakes, apparently the itbc is not compatible with these systems. Does anyone know how to disable this system and install an aftermarket controller? Selling dealer is playing dumb on situation, please advise.

John86

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Subject:
Procedure For Installation of Aftermarket Trailer Brake Controller in Lieu of Factory Installed Integrated Trailer Brake Controller #07-08-45-001A - (09/07/2007)[/align]
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Models:
2007-2008 Chevrolet Silverado[/align][align=left]




2007-2008 GMC Sierra[/align][align=left]




with Integrated Trailer Brake Controller (RPO JL1)[/align]

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This bulletin is being revised to add the 2008 model year, additional installation information and to emphasize that this is not a warranty repair. Please discard Corporate Bulletin Number 07-08-45-001 (Section 08 -- Body & Accessories).
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Some vehicle owners may request to have an aftermarket trailer brake controller added, in lieu of the factory Integrated Trailer Brake Controller (ITBC) RPO JL1. This request may be made if the trailer being towed is equipped with electric over hydraulic brakes. This style of trailer brake system is not supported by the ITBC. An aftermarket trailer brake controller may be installed to operate with the electric over hydraulic brakes, however the factory installed ITBC system will be disabled.
Installation Instructions
To install an aftermarket trailer brake controller, use the four blunt cut wires located near the data link connector. Make the following changes to the vehicle harness:




Four Blunt Cut Wires


Dark Blue

Circuit 47

Brake Signal to Trailer Connector


Red/Black

Circuit 242

Battery Power


Light Blue/White

Circuit 6311

Brake Switch Input


White

Circuit 22

Ground
[ol]The Red/Black wire, circuit 242, must be connected to stud #2 of the 30 Amp fuse of the Underhood Fuse Block. This wire is located between the left fender and the Underhood Fuse Block.
Locate connector X126 (on vehicles with RPO JF3 or JF7) or X115 (on vehicles with JL4) near the Underhood Fuse Block (Refer to SI Document ID#1849049). Circuit 47 from the blunt cut wires near the data link connector will end at connector X126 terminal "G" or X115 terminal "B5." Obtain enough Dark Blue 12 gauge wire to run from X126/X115 to the 7-way trailer connector at the bumper. On one end of the Dark Blue wire attach terminal part number 15304732, located in Delphi Tray 8 and insert into X126 "G" or terminal part number 15304720 located in Delphi Tray 19 and insert into X115 "B5." Run the Dark Blue wire in its own conduit along the frame to the 7-way trailer connector at the bumper. Remove circuit 47 from the 7-way trailer connector terminal "C" and tape the bare terminal and attach to the harness. Attach terminal part number 12110853, located in Delphi Tray 4, to the other end of the Dark Blue wire and insert it into the 7-way trailer connector terminal "C". [/ol]
Important:This procedure will not result in any Trailer Brake related display messages to be set. However, ITBC diagnostics will continue to function. If an ITBC fault is detected, a "Service Trailer Brake System" message will be displayed on the Driver Information Center (DIC) and an appropriate DTC will be stored in the ITBC module. The operator will still be able to adjust gain and access the "Trailer Gain / Output" display page in the DIC. However, the factory installed ITBC system will not sense a trailer connection and will not provide output to the trailer.
Warranty Information
This installation procedure is to be performed at the customer's request and at their expense. It is not a warranty repair and a claim should not be submitted for reimbursement.

beverlykasper

thanks for that.

kalle1066

Installed Tekonsha prodigy brake controller per instructions, performs flawlessly. Thanks for the imformation.