HOSE AS 2443336 - Caterpillar

standard instrument cluster has a diagnostic LED and alarm. The optional instrument cluster has diagnostic display screens. When there is a problem with the system, there will be some operational symptom that will be present. On machines equipped with the standard instrument cluster, Caterpillar ET must be used in order to access any diagnostic and event information.Troubleshooting the ECM may require additional information from the machine Service Manual. The following items may be required.
Electrical System Schematic
Parts Manual
Operation and Maintenance ManualAs a guide, a simplified system schematic is at the end of this manual. For a complete electrical system schematic, see the Electrical System Schematic in the machine Service Manual.When the troubleshooting procedure instructs you to REPAIR THE HARNESS, use the Electrical System Schematic in the machine Service Manual in order to trace the circuit. Inspect the wiring and perform a Wiggle Test using Cat ET. Refer to Testing and Adjusting, "Electrical Connector - Inspect" for additional information.During troubleshooting, inspect all component and harness connections before any component is replaced. If these connections are not clean and tight, the connections can cause electrical problems. The problems may be permanent or intermittent. Check that the wires are pushed into the connectors completely. Make sure that the connections are tight before any other tests are made.Repairs of the machine harness should be performed with the wire of the same size. All joints should be soldered. Ensure that all joints are tightly taped or all joints are covered with shrink sleeving. Use 1P-0810 Electrical Tape .Failure of an electrical component can cause the failure of one or more components. Always attempt to find the cause of a problem and correct the problem before replacing a component.Use the single screw in the center of the harness in order to remove the harness from the ECM.