AUTOOL Automotive Circuit Tester, Power Circuit Probe Kit

AUTOOL Automotive Circuit Tester, Power Circuit Probe Kit 9v-30V with Multimeter/Relay/Fuel Injector Tester/Oscilloscope, 0-5V Power Activating Component with 26ft Cable for 12V 24V Vehicle
- 【Multimeter & Oscilloscope Mode】Automotive circuit tester contains multimeter functions, it can quickly test the DC voltage, resistance, diode/continuity (DIO), current, and frequency. Combined with the oscilloscope function and buzzer, can test components according to voltage, resistance value, frequency duty cycle, and waveform diagrams to quickly diagnose problems with your circuit system.
- 【Relay Test & Injector Test】Electrical system diagnostic tool can test the common automotive relay, like 5-terminal relays, and 4-terminal relays. It is worth mentioning that the power tester outputs 4 different pulse signals to the injector, and check the injector spraying status.
- 【0-5V Power Supply & Component Activation】 The 0-5V power supply function is useful when checking the wiring to the ECU/ECM. Power Tester Probe can generate activation signals to the tested components, such as activating lights, motors and other on-board electric equipment.
- 【Smart Test & Positive & Negative Test】Power tester can automatically and quickly test automotive circuit voltage, resistance, positive and negative, intelligent recognize does not require manual selection, and the corresponding parameter values and prompts are displayed on the HD LCD screen.
- 【Widely Application】The BT280 intelligent electrical system circuit tester is dedicated to test all 9V-30V vehicle electrical systems. It can be widely used in testing continuity, signal circuit, activating components in your hand and in the vehicle, finding bad ground and short circuits, test trailer lights.
- 【Three Years Warranty】For any quality problems. If BT280 has any defect, we will provide new replacement or solutions for our customers until satisfaction without delay, and provides lifetime technical support. For any needs, you are warmly welcomed to contact us and we will get back to you ASAP within 24 hours.
SKU: | B0CDX1548T |
Product Description

Smart Test
Voltage, resistance, and positive and negative polescan be automatically identified of the tested component. It is mainly used for quick test without switching between different test modes.
Multimeter Mode
Multimeter function can quickly test the DC voltage, resistance, and diode in the circuit system, current, and frequency.
Oscilloscope mode
Be able to display the parameter curve diagram of the tested component, such as those produced by sensors, actuators, and control modules, on a screen for analysis.
Test and Clean Fuel Injector
The probe outputs 4 different pulse signals to the injector, and check the injector spraying status. This function can help diagnose injector conditions. It can work with any fuel pressure tester.
Component Activation
Electric system circuit tester can activate light, motors, wipers and other on-board electronic devices.
Relay function
Circuit tester is capable to test the common automotive relay, like 5-terminal relays,and 4-terminal relays.
Capable of setting 0-5V output voltage, used to verify the wiring condition of the tested component
Connect circuit tester with USB cable to a computer, open update tool on computer to upgrade program
Connect the probe negative clip to the vehicle ground wire, find the positive or negative pole
Used for lighting in dark working areas or when working at night to increase safety
You can customize in the settings screen. It also supports more than 14 languages.
Continuity Testing
Select resistance test function, use the probe tip with chassis ground of the vehicle or auxiliary ground lead, continuity can be tested on wires and components attached or disconnected.
Signal Circuit Testing
Use an OBD2 scanner to read out the fault code(DTC) from the vehicle and found the problem is with some kind of sensor circuit, there is a fast way to testing the sensors conditions with this probe.
Activating Component in Your Hand/Vehicle/w/Ground
With a flip of the power switch, you have a hot instant/grounding for voltage & polarity testing. Use the hot lead and ground wire at the same time to activate elements directly in your hand.
Checking for Bad Ground Contacts
Probe the suspected ground wire or contact with the probe tip. If the circuit breaker tripped, this circuit is more than likely a good ground.
Following & Locating Short Circuits
Remove the blown fuse from the fuse box.Use the probe tip to activate and energize each of the fuse contacts to find to short circuits.
Trailer Lights and Connection Test
Connect the auxiliary ground lead to the trailer light, insert the probe tip into the OBD socket to display the current voltage, check the function and direction of the connector and trailer lights.

AUTOOL Digital Automotive Multimeter
![]() ![]() DM301 | ||
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DescriptionAutomotive Multimeter, Automotive Oscilloscope,TRMS Auto-Ranging | DescriptionAutomotive Multimeter, Automotive Oscilloscope,TRMS Auto-Ranging | DescriptionAutomotive Multimeter, Automotive Oscilloscope,TRMS Auto-Ranging |
TestingVoltage,current,resistance,continuity,frequency and capacitance | TestingVoltage,current,resistance,continuity,frequency and capacitance | TestingVoltage,current,resistance,continuity,frequency and capacitance |
Measuring RangeDC100V,18A, 200 KΩ | Measuring RangeDC1000V,200mA, 1MΩ | Measuring RangeDC1000V,200mA, 1MΩ |
Short-circuit ProtectionPower failure protection | Short-circuit ProtectionPower failure protection | Short-circuit ProtectionPower failure protection |