Trailer Brake Control Module (JL1 with 31 Series)

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Trailer Brake Control Module (JL1 with 31 Series)

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
1	2 BK	1750	Ground
2	0.5 D-BU	7632	5-Volt Reference
3-5	-	-	Not Used
6	0.5 TN	2501	High Speed GMLAN Serial Data Bus (-)
7	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus (+)
8	0.5 TN	7631	Low Reference
9	0.5 L-GN	944	Relay Feedback
10	-	-	Not Used
11	0.5 L-GN/BK	7633	Integrated Trailer Brake Controller User Gain Signal
12-13	-	-	Not Used
14	0.5 TN	945	Integrated Trailer Brake Relay Control Active Low
15	0.5 PK	239	Ignition 1 Voltage
16	-	-	Not Used
17	0.5 L-BU	5986	Serial Data Communication Enable
18-20	-	-	Not Used
21	0.5 TN	2501	High Speed GMLAN Serial Data Bus (-)
22	0.5 TN/BK	2500	High Speed GMLAN Serial Data Bus (+)
23-24	-	-	Not Used
25	0.5 BN	7634	Integrated Trailer Brake Controller Redundant Manual Apply Signal
26	-	-	Not Used
27	0.5 YE	7635	Integrated Trailer Brake Controller Manual Apply Signal
28	0.5 D-BU	47	Solid State Relay Feedback
29-31	-	-	Not Used
32	2 RD/WH	4340	Battery Positive Voltage
33	0.5 YE/BK	7521	Solid State Relay Enable
34-36	-	-	Not Used
37	0.5 L-BU/WH	6311	TCC Brake Signal
38-47	-	-	Not Used

Connector Part Information

Harness: Chassis
OEM: 15491306
Service: 19168025
Description: 47-Way F ASG Series Sealed (BK)

Terminal Part Information

Pins: 1, 32
Terminal/Tray: 15476168/5
Core/Insulation Crimp: F/3
Release Tool/Test Probe: 15315247/J-35616-42 (RD)

Pins: 2, 6-9, 10-11, 14-15, 17, 21-22, 25, 28, 33, 37
Terminal/Tray: SAITS-A03T-M064/14
Core/Insulation Crimp: 9/9
Release Tool/Test Probe: J-38125-215A/J-35616-64B (L-BU)