EU/UK Ship No Tax GODIAG GT101 Pirt Circuit Tester With Car Power Line Fault Finding+ Fuel Injector Cleaning and Testing+ Current Detection+ Relay Testing

Brand: GODIAG Item No. AD179 In Stock. History 394 sold.

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 GODIAG Circuit Tester: GT101 GODIAG GT101 Pirt Circuit Tester With Car Power Line Fault Finding+ Fuel Injector Cleaning and Testing+ Current Detection+ Relay Testing
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23cm*18cm*8cm ( Inch: 9.06*7.09*3.15 )
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Product Description

1. GODIAG GT101 PIRT Power Probe is a multi-use circuit-tester with the diagnostic power from the car battery or the external battery. It is the best electrical tester for reducing diagnostic time in all 6- to 40-volt vehicle electrical systems. Undoubtedly it is the most versatile and practical tool ever for its users.
2. This tool simplifies the testing of fuse boxes, verifies the correct operation of motors, lights, relays, sensors, wires, and communication-circuits. The large digital color display makes for easy viewing in direct sunlight or complete darkness.

GODIAG GT101 Pirt Power Probe Automotive Tools


1. GODIAG PIRT Power Probe is a special circuit maintenance testing tool which is developed for automobile maintenance workers and engineers. 
2. It can be used to diagnose an open circuit, short circuit, detect positive and negative circuit and pulse current of power lines; and support the testing of lighting lamp, window lift motor, horn, ECU control Unit power supply and other individual component, vehicle component circuit. 
3. Moreover, its function also covers the detection of relays and fuel injectors as well as the cleaning of fuel injectors. 
4. The output current can be reversed to form a loop power, and when the current exceeds 20A, it automatically trip to protect the device and extend the service life. 
5. It can detect all 0-80v electronic systems, greatly shortening the detection time. The connection with the car battery is simple and easy to use.
GODIAG GT101 PIRT Power Probe Main Functions:
1. Circuit Troubleshooting Test (Short Circuit, Open Circuit)
When the vehicle's headlights, turn signals, lift windows, sunroofs and other functions fail, GT101 can be used to detect the circuit voltage or supply power for these components to find out whether it is a circuit problem or a component damage.
1) According to the circuit diagram, locate the fault point that may have the problem, and the GT101 electric tester can detect the positive and negative electricity.
2) Detect whether the circuit has normal positive or negative electricity.
3) Input positive voltage to the malfunctioning component ( for example, headlight or motor ). If the component works normally, it means that the circuit may be open. Otherwise, it means that the component is damaged.

GODIAG GT101 PIRT Power Probe-1

2. Relay Test 
When the car's headlights, turn signals, horn and the engine starter do not work, if there is no problem with these components after detection, you can check the relay switch.
After the relay is removed from the car, connect the adapter based on the connection of the relay.

GT101 Relay Test 
3. Fuel Injector Test
When the vehicle has difficulty in starting, acceleration and fuel consumption, etc, it is necessary to check the fuel injector.
When detecting the fuel injector, if the fuel injector is driven to open or close, the ammeter shows the normal value and the fuel injector woks normally, it means that the fuel injector is normal. Otherwise, it means that the fuel injector is damaged.

GT101 Fuel Injector Test
4. Fuel Injector Cleaning
When the fuel injector is blocked, the fuel injection is not smooth. There are carbon deposits and thick sticky substance in the gap of the fuel injector. The designed fuel injection volume or atomization effect cannot be achieved, it needs to be cleaned.
1) Prepare a fuel injector cleaner pressurized can or a carburetor cleaner pressurized can(nozzle diameter of the pressurized cans : 4mm)

2) Hold the manual cleaning tool tightly with your hand, and firmly fix the fuel injector with your fingers to prevent the pressure of the cleaner can from washing away the the fuel injector.
3) Pay attention to the hazards of liquid to human body during manual cleaning, and take protective measures. Do not operate in dangerous places with open flames because the pressurized cans are extremely flammable. Choose an open place to facilitate the discharge of cleaning liquid.)
GT101 Fuel Injector Cleaning
Key Features of GODIAG GT101 PIRT Power Probe:
1. Performs every type of service including power injection, measurement, ground testing, polarity checks, continuity testing and components activation.
2. Easy-to-read volt-ammeter allows you to read voltage and current at your fingertips.
3. With a flip of the output switch, you have positive and negative electricity via the probe for powering up electrical components like cooling fans, relays, etc..
4. Simultaneously uses the hot lead and the ground lead to activate components right in your hand.
5. Instantly identifies positive, negative and open circuits.
6. Tests for bad ground contacts instantly, allowing you to follow and locate shorts fast without wasting fuses.
7. Instantly checks continuity of switches and relays.
8. Circuit breaker protected.
9. Built-in Flashlight enables you to work in the dark.
10. Audio tone indicator allows for no-look menu scrolling once users are familiar with menu tone assignment.
11. 20ft (can be extended via extendable cable port) cable provides excellent accessibility to test along the vehicle.
12. Extremely easy to use and highly reliable.
13. Used for DC 6-40v cars, motorcycles, trucks, buses, engineering vehicles, vessels, tractors, mining vehicles and other vehicles that use DC circuits.

Key Features of GODIAG GT101 PIRT Power Probe
Comparison Chart of GODIAG GT101/GT102, JDIAG P200 and Autel PS100
Product Functions/Names
GoDiag GT101
GoDiag GT102
Product Picture
DC voltage 
AC voltage
Positive and negative voltage output
Component activation
Current Detection
Open circuit detection
Short circuit detection
Fuel injector test
Fuel injector cleaning
Relay test
Oscilloscope function

DC  Power
DC  Car battery power(Suitable for 6-40v)
Power Consumption
Operating Temperature 
-5 to 50 degrees Celsius
Storage Temperature    
-5 to 60 degrees Celsius
The Box Size 
The Main Unit Size
Wire Length
Shell Material 
ABS Environment-Friendly Materials 

Package List:
1pc x Main Unit of GODIAG GT101 PIRT Power Probe
1pc x Clip to Connect Battery
1pc x Probe
1pc x Probe Cap
1pc x Fuel Injector Test Lead
1pc x 10mm Fuel Injector Cleaning Connector
1pc x 12mm Fuel Injector Cleaning Connector
1pc x Simple Relay Test Adapter
5pcs x Simple Relay Connection Leads
1pc x English Manual

2024 FormulaFLash ECU Programmer ECU TCU Chip Tuning Tool

Shipping Method and Delivery Time:

EU, UK , US and Russia Warehouse Shipping: 3-5 working days. Fast Delivery & Tax Free.

China Warehouse Shipping:
DHL Shipping: 3-5 working days. Usually we declare a lower value on DHL invoice to help with customs clearance. Please remember to leave message if you have any special requirement.
Yanwen Express: 7-10 working days. No Tax for European Countries.
Standard Post: 7-15 working days. To South America and Africa countries it may take 20-25 working days. Customers can tick Express Shipping Service to ship by DHL.

For any question, please contact us at:
WhatsApp Business:+44 7418609676
WhatsApp After-sales Service: +86 18750906257
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GODIAG GT101 Tutorial Video: What the various hints mean

GODIAG GT101 Instructional Video: Fuel Injector Cleaning

GODIAG GT101 Tutorial Video: Testing Relays

GODIAG GT101 Instructional Video: Powering the Light Bulb

GODIAG GT101 Tutorial Video: Powering and Detecting Motors

GODIAG GT101 Tutorial Video: Determining Positive and Negative

GODIAG GT101 official website promotional video

Tech Service

GODIAG GT101 PIRT Power Probe stood out among 2022 hot circuit testers to win the love from most users. Let’s see if it’s worth buying.


What can GODIAG GT101 do?

  1. Detect open circuit, short circuit, voltage, positive & negative circuit output.
  2. Test lamp, window lift motor, horn, ECU control unit power supply, speed signal and electrical components.
  3. Professional relay test, fuel injectors test & clean.
  4. Fuse test, battery voltage test, current test, circuit voltage test, real and virtual power test, ignition pulse signal test, throttle voltage signal test, LAN vehicle & circuit test, Hall sensor performance test, crankshaft induction test, camshaft induction test.
  5. The output current can be reversed to form a loop power. It’ll automatically trip when the current exceeds 20A.
  6. Supports to detect all 0-80V electronic systems to save time.

Introduce the function and usage of GODIAG GT101 in detail

When to use GODIAG GT101 PIRT?

  1. For case when the car headlights do not light, doors and windows can not lift or horn can’t sound, etc. GT101 can detect component problem or vehicle line problem.
  2. Test generator control signal, idle motor control signal, ignition pulse signal from computer, throttle sensor voltage, etc.
  3. Detect whether the battery voltage is normal when vehicle can not start.
  4. Detect whether interface output voltage is normal when decoder can’t identify vehicle.


Which vehicles are applicable for GODIAG GT101?

GT101 Circuit Analyzer is suitable for DC6-40V cars, motorcycles, trucks, buses, engineering vehicles, boats, tractors, mine vehicles and other vehicles using DC circuit.

Introduce the function and usage of GODIAG GT101 in detail


What’s in GT101 Power Probe package?

Main unit

Rlay clamp with cable

Clip for connecting battery


Relay connection cable

10mm/12mm injector cleaning tools

Injector connection cable
Introduce the function and usage of GODIAG GT101 in detail


How to use GT101 Circuit Tester?

Connection &Self-Check

  1. Connect power supply, black clip in negative pole, red clip in positive pole.
  2. Turn on GT101 to install the probe.
  3. Put GT101 slowly close to power negative pole to check.

Introduce the function and usage of GODIAG GT101 in detail

Output Current Function Display

  1. Clamp the bulb negative pole with GT101 end clip
  2. Hold GT101 upward, press the switch to output positive electricity.
  3. Slowly approach the probe to the bulb positive pole, the bulb will light up.

Introduce the function and usage of GODIAG GT101 in detail

Relay Test

  1. Connect the relay line, hold GT101 and press the yellow function button.
  2. If the replay test line lamp is on normal, indicating that the replay is functioning normally.

Introduce the function and usage of GODIAG GT101 in detail

Fuel Injector Test

  1. Connect GT101 to fuel injector test line one end.
  2. Plug the other end into fuel injector(2 lines representing different injectors calibers).
  3. Hold GT101 and press yellow button. When hearing the sound from fuel injector accompanied by slight vibration that indicating normal.

Introduce the function and usage of GODIAG GT101 in detail


Fuel Injector Cleaning

  1. Connect fuel injector to cleaning connector.
  2. Plug the other end of cleaning connector to a cleaner.
  3. Connect view injector cable & view injector.
  4. Hold GT101 to press yellow button, hold the view injector cleaning connector with the other hand.

Note: Please hold tightly to prevent cleaning connector from falling off. Because the cleaning action will vibrate. The cleaner will spray from nozzle.

Introduce the function and usage of GODIAG GT101 in detail

Compare to other 2022 power probes

Items GODIAG GT101 PIRT GODIAG GT102 PIRT JDIAG P200 Smart Hook Autel PowerScan PS100
Price €76 €67 €161 €83
DC Voltage
AC Voltage × ×
Positive & Negative Voltage Output
Component Activation
Current ×
Resistance × ×
Open Circuit Detection
Short Circuit Detection
Fuel Injector Test ×
Fuel Injector Cleaning × ×
Relay Test ×
Oscilloscope Function × × ×


According to the comparison table, GT101 is the most cost-efficient circuit tester among them. It has more features with a affordable price. That’s why GT101 can be one of the best sellers in 2022.