STUD 5V8840 - Caterpillar

diagnostics may be accessed through the machine display or Cat® Electronic Technician (Cat ET).Reference: Troubleshooting requires additional information from the following:
Testing and Adjusting
Electrical Schematic
Parts Manual
Operation and Maintenance ManualAs a reference, a simplified schematic is included at the end of this manual. When the troubleshooting procedure instructs you to “Repair or replace the harness”, use the Electrical Schematic to trace the circuit. Perform continuity checks at the harness connectors to locate harness failures. At the connectors of the components, always check the ground circuit. There must be less than 5 ohms of resistance between any system ground and the frame ground. Ground resistance greater than 5 ohms can cause incorrect problem diagnosing.Inspect all connections before any component is replaced. Connections that are not clean and tight can cause permanent, or intermittent electrical problems. Check that the wires are pushed into the connectors completely. Make sure that the connections are tight before other tests are made.If wire insulation is punctured, repair the damage. Seal the damaged wires with 8T-0065 RTV Silicone Sealant. Cover the sealant with two layers of 1P-0810 Tape.Failure of an electrical component may cause the failure of other components. Correct the cause of an electrical system failure before replacing e a component.When removing the harness from an ECM, use the single screw in the center of the harness connector.