PLATE-SPRING 2248178 - Caterpillar

Table 1
Harness Code    
Sales
Model    Machine
Code (1)    Segment and Contact (2)    
A36 A37    A17    A18    A19    
768C
769C     001     off     ON     off     off     ON    
771C     010     ON     off     ON     off     ON    
771D     030     ON     ON     ON     off     ON    
772B
773B     002     off     ON     ON     ON     ON    
773D     022     ON     ON     ON     ON     ON    
775B     011     ON     off     ON     ON     off    
775D     031     ON     ON     ON     ON     off    
776C
777D     004     ON     off     ON     ON     ON    
785     005     off     off     off     off     ON    
785 (3)     015     ON     off     off     off     ON    
785B     023     off     off     ON     ON     off    
789     006     off     off     off     ON     off    
789 (3)     016     ON     off     off     ON     off    
789B     024     off     off     ON     off     ON    
793     007     off     off     ON     off     off    
793 (3)     017     ON     off     ON     off     off    
793B
793C     025     off     off     off     ON     ON    
( 1 ) This number is shown during the self test.
( 2 ) See Illustration 1 for the location of the listed segment. The listed contact corresponds to the connector of the ARC.
( 3 ) For the Transmissions that use EPTC II, segments that are ON are grounded and segments that are Off are open.
Illustration 1 g00339232
(A17) Harness code 2 (A18) Harness code 1 (A19) Harness code 0 (A36) Harness code 4 (A37) Harness code 3Mode 4 is used to determine whether the harness code inputs are open or the harness code inputs are grounded. The Automatic Retarder Control (ARC) does not detect all faults. This mode is useful for tracing circuits and for determining the status of the harness code inputs. The Electrical System Schematic is also necessary in order to properly use Mode 4.The readout consists of numerous segments. Each harness code input and the corresponding connector contact is assigned to a specific segment of the readout. See Illustration 1. If a segment is on, the corresponding harness code input is grounded. If a segment is off, the corresponding harness code input is open. All of the segments of the readout are not used.Note: The indicators also function in the same manner as the Normal Mode (Mode 0). See Systems Operation, "Normal Mode".The display enters Mode 4 when "-4-" is shown on the readout and the set switch and the clear switch are