The AUTOOL BT280 electrical circuit tester is a comprehensive electrical system tester designed for 9V-30V vehicle systems. It features a 2.4-inch LCD screen, multimeter mode, oscilloscope mode, relay test, component activation, and injector mode. With its advanced features and user-friendly interface, this tool is perfect for automotive professionals and DIY enthusiasts alike.
AUTOOL BT280 Electric electrical circuit tester Analyzer
AUTOOL BT280 electrical circuit tester is the newest generation intelligent Electrical System Circuit Tester with a 2.4-inch large-size LCD screen display. It is dedicated to testing all 9V-30V vehicle electrical systems. BT280 is Convenient, Fast, and Intelligent!

AUTOOL BT280 Car Electric Circuit Tester Features :
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Multimeter Mode&Smart Test: AUTOOL BT280 Electric System Tester is covered with the comprehensive parameters of a Multimeter, it can quickly test and automatically identify the Voltage, resistance, and Positive and Negative poles of the tested component, which brings the user a lot of conveniences.
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Oscilloscope Mode&Relay Test: AUTOOL BT280 is not only able to display the parameter curve diagram of the tested component, such as voltage, frequency, time, etc., but also can test the common automotive relay, like 5-terminal relays, and 4-terminal relays.
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Component Activation & Injector Mode: It can generate “Active” signals for components, such as lights, motors, and other onboard electronic devices. Also, different pulse signals can be output to the injector, which provides 4 pulse modes to better detect the condition of the injector.
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0-5V Power Supply & Voltage Alarm: Capable of setting 0-5V output voltage, used to verify the wiring condition of the tested component. They are equipped with voltage-setting alarms. If a short circuit or fault causes the voltage to be greater than or less than the set value, the device will alarm.
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Multi-language Feature: 14 languages supported, English, Spanish, German, Russian, Italian, Polish, Portuguese, French, Vietnamese, Malaysian, Filipino, Indonesian, and Arabic.
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Three-Year Warranty, Lifetime Maintenance: For damage caused by non-human factors, AUTOOL promises to resend parts for free within 3 years. For any needs, you are warmly welcome to contact us and we will get back to you ASAP within 24 hours.


AUTOOL BT280 Electrical Circuit Tester Specifications
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LCD: (320*240 DPI) TFT color display
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Working temperature: 0-60°C (32-140 F°)
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Storage temperature: 40-70°C (-40-185 F°)
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External power supply: 12V or 24V Powered by battery
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Minimum working voltage: 9

Package Included:
- 1PCS AUTOOL BT280 electrical circuit tester Main Unit
- 1PCS Solid Copper Test Probe Tip
- 1PCS Extension Connection Line
- 1PCS Battery Clam
- 1PCS Relay Test Line
- 1PCS Probe Adapter
- 1PCS AUTOOL Black Bag

LCD |
(320*240 DPI) TFT color display |
Working temperature |
0-60°C (32-140 F°) |
Storage temperature |
40-70°C (-40-185 F°) |
External power supply |
12V or 24V |
Powered by battery |
Yes |
Minimum working voltage |
9V |
Maximum working voltage |
30V |
Maximum measuring voltage |
150V |
Minimum measuring voltage |
0.1V |
Resistance measurement range |
1 ohm~200K ohm |
Current measuring range |
0~18A |
Maximum continuous current |
18A |
Working voltage |
9-30V |
Function 1 |
Test the Voltage, resistance, Positive and Negative poles of component |
Function 2 |
Test the common automotive relay, like 4 & 5-terminal relays |
Function 3 |
Display the parameter curve diagram of the tested component |
Function 4 |
Can detect car fuel injector circuit problems |
Function 5 |
English, Spanish, German, Russian, Italian, Polish, Portuguese, French, Vietnamese, Malaysian, Filipino, Indonesian, Arabic, and Thai |
Function 6 |
Three-Year Warranty, Lifetime Maintenance |