| Connector 1: | Brake Fluid Level Switch (Except JC4) | 
| Connector 2: | Brake Pressure Differential Switch (JC4) | 
| Connector 3: | Park Brake Switch | 
| Connector 4: | Supplemental Brake Assist Pump Motor (JC4) | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | BK  | 550  | Ground  | 
B  | PU  | 333  | Brake Fluid Level Sensor Signal  | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | PU  | 333  | Brake Fluid Level Sensor Signal  | 
B  | BK  | 550  | Ground  | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | L-BU  | 1134  | Park Brake Switch Signal  | 
Connector Part Information
  | 
Terminal Part Information
  | 
Pin  | Wire Color  | Circuit No.  | Function  | 
|---|---|---|---|
A  | BK  | 1050  | Ground  | 
B  | PK  | 139  | Ignition 1 Voltage  | 
C  | BK/WH  | 1851  | Ground  | 
D  | BK/WH  | 5668  | Engine ON Signal  | 
E  | D-GN/WH  | 817  | Vehicle Speed Signal  | 
F  | D-BU  | 2713  | Supplemental Brake Assist Signal  |