| Connector 1: | Brake Master Cylinder Presssure Sensor (JL1) | 
| Connector 2: | Trailer Brake Controller Module (TBCM) | 
| Connector 3: | Trailer Brake Controller Solid State Relay | 
| Connector 4: | Trailer Brake Control Panel Switch | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | 0.5 YE/BK  | 6032  | Low Reference  | 
B  | 0.5 GY  | 6031  | 5-Volt Reference  | 
C  | 0.5 OG  | 6030  | Brake Master Cylinder Presssure Sensor Signal  | 
Connector Part Information
  | 
Terminal Part Information
 
  | 
Pin  | Wire Color  | Circuit No.  | 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  | 0.5 YE  | 7635  | Integrated Trailer Brake Controller Manual Apply Signal  | 
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  | 
26-27  | --  | --  | Not Used  | 
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
  | 
Terminal Part Information
 
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | 3 D-BU  | 47  | Trailer Brake Output Supply Voltage  | 
B  | 3 BK  | 1750  | Ground  | 
C  | 0.5 TN  | 945  | Integrated Trailer Brake Relay Control Active Low  | 
D  | 0.5 L-GN  | 944  | Relay Feedback  | 
E  | 0.5 YE/BK  | 7521  | Solid State Relay Enable  | 
F  | 3 RD/BK  | 242  | Battery Positive Voltage  | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
1-2  | --  | --  | Not Used  | 
3  | 0.35 D-BU  | 7632  | 5-Volt Reference  | 
4  | 0.35 YE  | 7635  | Integrated Trailer Brake Controller Manual Apply Signal  | 
5  | 0.35 BN  | 7634  | Integrated Trailer Brake Controller Redundant Manual Apply Signal  | 
6  | 0.35 L-GN/BK  | 7633  | Integrated Trailer Brake Controller User Gain Signal  | 
7  | 0.35 YE  | 6817  | LED Backlight Dimming Control  | 
8  | 0.35 TN  | 7631  | Ground Return  |