The following information is a guide to reading the tables on the back of the Electrical System Schematic.
- The "Component Location" table uses white circles to mark the locations in the profile of the machine and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the machine. Refer to the corresponding footnote at the end of the table for a description of the location.
- The "Harness Connector Location" table uses white circles to mark the locations in the general view and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the machine. Refer to the corresponding footnote at the end of the table for a description of the location.
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| Illustration 1 | g01961456 |
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Electronic Control Module (ECM) | |
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| Illustration 2 | g01961457 |
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Machine Harness Connectors J1 and J2 that mate to the ECM. | |
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| Illustration 3 | g01476800 |
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The Machine ECM and the Implement ECM located in the cab, behind the seat (cover removed) (1) Machine ECM (2) C-C5 / RH-C1 harness connectors (3) C-C10 / LP-C1 harness connectors (4) RH-C16 / RP-C1 harness connectors (5) Implement ECM | |
The Implement ECM is located in the cab behind the operator seat under the cover on the lower right-hand side. (facing to the rear of the machine)
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| Illustration 4 | g02475845 |
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Service Connector (arrow) | |
The service connector for the Cat ET connection is located on the rear right side of the operators seat.
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| Illustration 5 | g01961460 |
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Location of the two cab bulkhead 70 contact connectors that pass many of the Machine ECM and Implement ECM circuits through the cab wall (view: from the outside of the cab on the lower hand right side of the machine) (6) CH-C10 Upper 70 contact connector (Implement ECM circuits) (7) CH-C2 Lower 70 contact connector (Machine ECM circuits) | |
Most of the Machine ECM circuits and the Implement ECM circuits that are for chassis mounted components pass through the lower right-hand cab wall in two 70 contact bulkhead connectors.
The lower CH-C2 bulkhead connector connects many circuits from the "CH" machine wiring harness that is outside of the cab to the "C-C1" harness connector for Machine ECM circuits inside of the cab.
The upper CH-C10 bulkhead connector connects many circuits from the "CH" machine wiring harness that is outside of the cab to the "RH-C6" harness connector for the Implement ECM circuits inside of the cab.
When troubleshooting an ECM circuit for a component that is located outside of the cab, the bulkhead connectors provide a good check point in a circuit that will help to isolate the location of the problem.
Most of the machine harness connectors that are not shown here are located in the general area of the components that are being connected.