RING-RETAINING 3594893 - Caterpillar

Illustration 1 g00970474
Schematic of the Tong Position Switch (1) Tong position close. (2) Tong position open. (3) Tong position switch. (4) Power train electronic control module (ECM).
Table 1
Circuit Continuity (1)    
Tong Position Switch - CID 0450    
Connector J1 Contact No. of Power Train ECM     Connector (2) Contact No. of Joystick Handle     Wire No.     Wire Function     OPEN Position     HOLD Position     CLOSE Position    
29     3     C906-PU     Tong Open Input     X     O     O    
20     5     F839-OR     Tong Off Input     O     X     O    
35     4     C907-WH     Tong Close Input     O     O     X    
( 1 ) Open no continuity to ground (O). Closed continuity to ground (X).
( 2 ) Ground is contact No. 1 wire 202-BK of the grapple control joystick handle connector.Table 1 lists the continuity to ground of each switch circuit (input) for the three positions of the switch.Note: Wire 202-BK is connected to the frame ground.Tong position switch (3) has three inputs to J1 connector of power train Electronic Control Module (ECM) (4). A fault is recorded when the status of the switch inputs is invalid. One of the inputs should be grounded at all times. See Table 1. The test points for the switch are at