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Topdiag | SKU:
B0178
TopDiag P100 | Circuit Tester
Regular price
€51,95 incl.
€42,93 excl.
Unit price
Translation missing: en.products.product.price.unit_price_separator
Unavailable
Warranty directly via AsTools
Warranty directly via AsTools
We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist you immediately. Only in exceptional cases do we still send the product to the supplier.
2 years warranty on all products
2 years warranty on all products
All our products come with a 2-year factory warranty. This ensures you long-lasting quality and service.
Easy returns
Easy returns
You can easily request your return through your account. We will send you the return label by email. Return shipping costs are your responsibility.
Professional customer service
Professional customer service
Our experts are ready to help you quickly and professionally, both online and in our physical store. Questions? Feel free to contact us!
Topdiag | SKU:
B0178
Regular price
€51,95 incl.
€42,93 excl.
Unit price
Translation missing: en.products.product.price.unit_price_separator
Unavailable
The TopDiag P100 circuit tester is designed for diagnosing electrical systems in vehicles with a voltage range of 6 to 30 volts, making it suitable for both 12V cars and 24V commercial vehicles. The device is powered directly from the vehicle battery via the included battery clamps or a 12V cigarette lighter adapter. Physical connection to the wiring or components being tested is made through the sharp, removable test probe. In electrical diagnostics, this tester is primarily used for on-site verification of voltage levels, continuity, and the presence of positive and ground connections during troubleshooting.
During operation, the tester functions as an active diagnostic tool that both measures signals and can supply voltage. Via the LCD display, the technician reads current values for AC/DC voltage, resistance, and diodes, including parameters such as frequency and duty cycle for alternating current. With the integrated toggle switch, the tester actively applies positive or ground to a component, such as a cooling fan, windshield wiper motor, or relay, to force operation without connecting an external power source. Additionally, the system detects directly when touching a wire whether it's positive, ground, or an open circuit via colored LEDs and an audible signal, which simplifies wire tracing and ground fault detection.
KEY FEATURES
✔10-meter extension cable — Reaches the full length of the vehicle, from engine bay to trailer connector, without moving the device.
✔Control components with the toggle switch — Apply positive or ground directly to a load to force operation, without an external power source or jumper cables.
✔Works from 6V — More versatile than many circuit testers that only start at 9V, and therefore also suitable for motors and classic vehicles.
✔Built-in work light and selectable tones — Illuminates the measurement area and confirms readings acoustically, so you don't have to constantly watch the display.
IMPORTANT NOTES
✕Never use on control modules and data lines — Accidental direct 12V power applied to a CAN bus line or sensor wire will permanently damage an electronic control unit.
✕Four measurement modes — DC voltage, AC voltage, resistance, and diode; waveform analysis or current measurement in amps requires different tools.
✕Voltage range of 6V to 30V — High-voltage systems in hybrid and electric vehicles are outside the scope of this tool.
✕Vehicle Power Supply — The device does not operate independently; an external power source is required when the battery is depleted.
Application and Functionality
The TopDiag P100 offers a range of measurement and test modes for everyday automotive electrical diagnostics.
- AC/DC Voltage Measurement: Measures DC and AC voltage directly in the circuit. In AC mode, frequency and duty cycle are also displayed.
- Resistance and Diode Testing: Checks wiring continuity, including OL display for broken circuits, and verifies correct forward bias direction and reverse voltage of diodes in the electrical system.
- Polarity Detection: Instantly identifies whether a wire carries positive, ground, or no connection, supported by a red or green LED indicator on the housing.
- Ground and Contact Testing: Detects poor ground connections. The tester emits a warning signal when transition resistance to the chassis is high, eliminating the need for time-consuming voltage drop measurements.
Special Features and Capabilities
This model includes active test functions and integrated safety features that make diagnostics and troubleshooting more efficient.
- Component Activation: Allows you to apply battery voltage or ground directly to a component via the toggle switch to physically verify operation, whether installed or removed.
- Short Circuit Protection: Equipped with an internal automatic circuit breaker. When testing a circuit with a short, the tester shuts down to prevent damage to internal electronics and vehicle wiring.
- Short Circuit Tracing and Locating: Enables technicians to check wiring step-by-step and pinpoint the exact location of a ground fault without repeatedly replacing fuses.
- Trailer Light Testing: Provides functionality to test pins and connections on trailer connectors directly for positive and ground.
Package Contents
- 1x TopDiag P100 circuit tester
- 1x 10-meter extension cable
- 1x Battery clamp adapter cable
- 1x Cigarette lighter adapter cable
- 1x Removable test probe
- 1x Plastic storage case
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Good to Know: Exercise extreme caution when actively powering components via the toggle switch if the test probe is near sensitive control modules, sensor wires, or CAN bus communication lines. Use this activation function only on actuators such as motors, heavy relays, and lighting. Unintended direct 12V application to a data line can permanently damage an electronic control unit.
Technical Specifications
| Specification | Description |
|---|---|
| Brand | TopDiag |
| Model | P100 |
| Voltage Compatibility | 6V - 30V DC Systems |
| Test Modes | DC Voltage, AC Voltage, Resistance and Diode |
| Display Type | TFT Color Screen |
| Extension Cable Length | 10 meters |
| Protection | Built-in Circuit Breaker for Overload and Short Circuit Protection |
| Languages | Multilingual Menu |
| Additional Features | Built-in LED Work Light with Selectable Tones |
| Item Number | B0178 |
Reviews
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★★★★★
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Good piece of equipment super
Good piece of equipment super price
