Description: Electrical Circuit Tester
Condition: New
Part Number: 3163878
Brand: Cummins
Fitment Guide:
- Heavy-duty trucks
- Buses
- Construction equipment
- Industrial machines
- Generator sets
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An Electrical Circuit Tester is a tool used to check whether an electrical circuit has power, ground, or a wiring problem. Technicians use it to diagnose electrical issues in vehicles, engines, and equipment.
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Verify electrical power
- Confirms whether voltage is reaching a component such as a relay, sensor, starter, or solenoid.
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Locate wiring faults
- Helps find problems such as:
- Broken wires
- Loose connections
- Corroded terminals
- Short circuits
- Poor ground connections
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Test electrical components
- Used to check whether switches, relays, fuses, motors, and solenoids are receiving and passing electrical current properly.
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Reduce troubleshooting time
- Allows technicians to quickly identify whether a problem is caused by the power supply, wiring, or the component itself.
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Prevent unnecessary part replacement
- Helps confirm that a component is actually faulty before replacing it.
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Signs of Faulty:
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No power or no response
- The tester does not turn on or show any indication when connected to a known-good circuit.
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Incorrect voltage readings
- The tester shows voltage when there is none, or shows no voltage when power is present.
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Inconsistent readings
- Results change randomly when testing the same circuit.
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Damaged probe or leads
- Cracked insulation, bent probes, or broken wires can cause unreliable tests.
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Poor connection
- The tester works only when the leads are moved or held in a certain position.
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Indicator light/display does not work correctly
- A test light may not illuminate, or a digital display may show incorrect values.
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Battery-related issues (for electronic testers)
- Weak or dead internal batteries can cause false readings or prevent operation.
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Failed continuity testing
- The tester cannot correctly identify an open or complete circuit.
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Manufacturer information
Cummins® is a worldwide leader in the production of engines, agricultural components, and other power-generating devices for various industries, including medium and heavy duty trucks, light commercial vehicles, buses, agriculture, and construction. Founded in 1919, this company stays true to its mission of making people's lives better by continuously improving its product line-up and introducing new solutions for a more prosperous world. Its core values—integrity, diversity and inclusion, excellence, caring, and teamwork—are what make it a successful company today—a worldwide leader with a network of more than 600 company-owned and independent distributors and almost 6,000 dealers in approximately 190 countries.
Warranty
First Truck Parts offers a 365-days warranty for all types of parts and in any condition. The warranty applies only to buyers who have placed an order on our website.
