GoDiag GT101 | Circuit tester
Warranty handled directly by AsTools
Warranty handled directly by AsTools
We handle warranty cases ourselves, quickly and without the intervention of the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually help 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 way, you are assured of long-lasting quality and service.
Easy returns via Returnless
Easy returns via Returnless
Returns are easy via Returnless. Register your return online and choose your own shipping method. Return costs are at your own expense.
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!
The GoDiag GT101 is a circuit tester for diagnosing electrical systems in vehicles operating on a voltage of 6 to 40V DC. This device combines the functions of a multimeter, test lamp, built-in flashlight, and test probe. The bright LCD color screen displays real-time voltage and resistance, simplifying circuit analysis. The tester is equipped with a 6 meter long cable for a wide range around the vehicle.
In addition to the basic functions, the GT101 offers specific test modes for checking, activating, and cleaning fuel injectors and testing relays. The built-in overload protection with an 8A circuit breaker protects the tool and the vehicle circuit from damage. With the component activation function, the user can directly supply voltage or ground to verify the operation of electrical components such as fan motors and lamps.
Application and functionality:
The circuit tester can be used for various diagnostic tasks on the electrical system of vehicles such as passenger cars, trucks, and motorcycles.
- Voltage and polarity test: Measures DC voltage from 0.3 to 70V and quickly identifies positive, negative, and open circuits.
- Continuity test: Checks continuity in wires, switches, fuses, and other components with visual and audible indication.
- Component activation: Supplies battery voltage or ground directly via the probe to activate components such as lamps, motors, and relays without using jumper cables.
- Bad ground detection: Traces and locates bad ground connections by measuring voltage drop.
- Short circuit detection: Identifies short circuits and traces the circuit to find the cause without wasting fuses.
- Injector test: Tests the signal and operation of fuel injectors and displays the data on the screen.
- Injector cleaning: Generates pulse signals to activate the injector for cleaning in combination with a cleaning fluid.
- Relay test: Tests the functionality of various types of automotive relays.
- Built-in flashlight: Two LED lights at the front illuminate the workspace in dark conditions.
Package Contents:
- 1x GoDiag GT101 Circuit tester
- 1x Probe tip
- 1x Battery clamp connection
- 1x Connection cable for relay
- 1x Manual
- 1x Storage case
Technical specifications:
| Specification | Description |
|---|---|
| Brand | GoDiag |
| Model | GT101 |
| Product Type | Circuit Tester |
| Display | LCD Color Screen |
| Operating Voltage | 6 - 40V DC |
| DC Voltage Test Range | 0.3 - 70V |
| Resistance Test Range | 1 - 200 KΩ |
| Maximum Current | 8A |
| Overload Protection | 8A Circuit Breaker (resettable) |
| Cable Length | 6 meters |
| Operating Temperature | -10°C to 60°C |





