EDGE 4440151 - Caterpillar

System Schematics
The following system schematics are correct, but do not show all connections. Reference For additional details, see the following machine Electrical Schematics:
Electrical Schematic, KENR5784, "950K/962K ELECTRICAL SYSTEM"
Electrical Schematic, KENR6462, "980K WHEEL LOADER ELECTRICAL SYSTEM"
Electrical Schematic, RENR9766, "966K/972K WHEEL LOADERS ELECTRICAL SYSTEM"Conversion Harness for Cat® Machines
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Conversion harness schematicLegacy Harness For Cat® Machines
Table 1
Legacy Harness Connections    
P1 Connector
Pin Number    Harness Wire    Description    Connection Point for the Machine    
1     125-OR     Unswitched Power     Fused (5 amp) unswitched power circuit (1)    
2     200-BK     Ground     Machine ground    
3     308-YL     Keyswitch On     Circuit that provides battery voltage only when the keyswitch is turned to the ON position    
4     403-GN     R-term     Alternator R-term circuit (2)    
5     944-OR     Cat® Data-link +     Cat® Data-link communications "+" circuit    
6     945-BR     Cat® Data-link -     Cat® Data-link communications "+" circuit    
7     Y795-GN     CAN LOW     CAN communications LOW circuit (if present)    
8     Y794-OR     CAN HIGH     CAN communications HIGH circuit (if present)    
( 1 ) The supply voltage must be 12 VDC or 24 VDC.
( 2 ) If an R-term input is not available, a DC voltage that goes high when the engine in running may be used. PL321SR Connection For Field Installation
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Overview of the connection of the PL321SR field installation group (Conversion)Cat® and CAN Data-Links
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Cat® data-link
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CAN data-linkVIMSTM 3G Main ECM / PL121
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VIMSTM 3G Main ECM / PL121 circuitVIMSTM 3G Main ECM / PL300 PL522 and PL523
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VIMSTM 3G Main ECM / PL300 PL522 and PL523 circuit