| Tools Needed | Quantity | |
| 4C-4911 | Battery Load Tester | 1 |
| 6V-7070 | Digital Multimeter | 1 |
Most of the tests of the electrical system can be done on the engine. The wiring insulation must be in good condition. The wire and cable connections must be clean and tight. The battery must be fully charged. If the on-engine test shows a defect in a component, remove the component for more testing.
Refer to Testing And Adjusting Electrical Components, REG00636 for the complete specifications and procedures for the components of the starting circuit and the charging circuit.
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| Illustration 1 | g00283565 |
4C-4911 Battery Load Tester | |
The 4C-4911 Battery Load Tester is a portable unit in a metal case. The 4C-4911 Battery Load Tester can be used under field conditions and under high temperatures. The tester can be used to load test all 6, 8, and 12 Volt batteries. This tester has two heavy-duty load cables that can easily be fastened to the battery terminals. A load adjustment knob is located on the top of the tester. The load adjustment knob permits the current that is being drawn from the battery to be adjusted to a maximum of 1000 amperes. The tester is cooled by an internal fan that is automatically activated when a load is applied.
The tester has a built-in LCD. The LCD is a digital voltmeter. The LCD is a digital meter that will also display the amperage. The digital voltmeter accurately measures the battery voltage at the battery through tracer wires that are buried inside the load cables. The digital meter, that displays the amperage, accurately displays the current that is being drawn from the battery which is being tested.
Note: Refer to Operating Manual, SEHS9249 for more complete information for the use of the 4C-4911 Battery Load Tester.
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| Illustration 2 | g00283566 |
6V-7070 Digital Multimeter | |
The 6V-7070 Digital Multimeter is a completely portable, hand-held instrument with a digital display. This multimeter is built with extra protection against damage in field applications. The multimeter is equipped with seven functions and 29 ranges. The 6V-7070 Digital Multimeter has an instant ohms indicator. This indicator permits checking continuity for a fast inspection of the circuits. The multimeter can also be used for troubleshooting capacitors that have small values.
Note: Refer to Special Instruction, SEHS7734 for complete information for the use of the 6V-7070 Digital Multimeter.