Generator Set Control Panel for Switchgear Conversion Caterpillar

Troubleshooting the Caterpillar Monitoring System requires additional information from the Engine Service Manual. The Electrical System Schematic, Electronic Troubleshooting Guide, Parts Manual, and the Operation And Maintenance Manual are required support material.

For reference, a typical schematic is included at the end of this manual. For an accurate representation of the engine that is being diagnosed, see the Electrical System Schematic that is located in the Engine Service Manual.

When the troubleshooting procedure instructs the operator to REPAIR THE HARNESS, use the Electrical System Schematic in the Engine Service Manual to trace the circuit. To locate failures in the harness, the operator should perform continuity checks at the connectors. At component connectors, always check the ground circuit. Less than five ohms of resistance is required between the ground contacts of the connector and battery ground. Ground resistance that is greater than five ohms can cause incorrect diagnosing of problems.

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. The operator should verify that the connections are tight.

Failure of one or more electrical components can cause the failure of other components. Before replacing a component, the operator should attempt to find the cause of the failure. Also, the operator should attempt to correct the cause of the electrical system fault.