| Table 1: | Air Brake Relay | 
| Table 2: | Air Brake Dryer | 
| Table 3: | Low Air Pressure Switch-Primary | 
| Table 4: | Low Air Pressure Switch-Secondary | 
| Table 5: | Park Brake Switch | 
 
 | |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information  | 
 
  | ||||||
Pin  | Wire Color  | Circuit No  | Function  | ||||
86  | BN  | 441  | Ignition 3 Voltage  | ||||
30  | RD  | 442  | Battery Positive Voltage  | ||||
87  | PPL  | 2661  | ABS Switch Signal  | ||||
85  | BK  | 250  | Ground  | ||||
 
 | |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information  | 
 
  | ||||||
Pin  | Wire Color  | Circuit No  | Function  | ||||
A  | BN  | 541  | Ignition 3 Voltage  | ||||
B  | BK  | 350  | Ground  | ||||
 
 | |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information  | 
 
  | ||||||
Pin  | Wire Color  | Circuit No  | Function  | ||||
C  | BK  | 350  | Ground  | ||||
D  | D-GN/WH  | 2662  | Low Air Pressure Switch Signal  | ||||
 
 | |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information  | 
 
  | ||||||
Pin  | Wire Color  | Circuit No  | Function  | ||||
C  | BK  | 350  | Ground  | ||||
D  | D-GN/WH  | 2662  | Low Air Pressure Switch Signal  | ||||
 
 | |||||||
|---|---|---|---|---|---|---|---|
Connector Part Information  | 
 
  | ||||||
Pin  | Wire Color  | Circuit No.  | Function  | ||||
A  | L-BU  | 1134  | Park Brake Switch Signal  | ||||
B  | BK  | 750  | Ground  | ||||