GODIAG 
GT103 Mini Pirt Electric Circuit Tester Vehicles Electrical System Diagnosis/ 
Fuel Injector Cleaning & Testing/ Relay Testing
 
GODIAG 
GT103 Mini Pirt Electric Circuit Tester 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 6-30 volt vehicle 
electrical systems. 
 
This 
tool simplifies the testing of fuse boxes, verifies the correct operation of 
motors, lights, relays, sensors, wires, and communication-circuits. Thus GT103 
is the most versatile and practical tool ever for its users.
Product 
Functions:
 
1.Circuit 
Troubleshooting Test (Short Circuit, Open Circuit)
 
When 
the vehicle's headlights, turn signals, lift windows, sunroofs and other 
functions fail, GT103 can be used to detect the 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 GT103 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.
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.
  
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 and 
the fuel injector woks normally, it means that the fuel injector is normal. 
Otherwise, it means that the fuel injector is damaged.
  
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.)
  
Product 
Features:
 
Performs 
every type of service including power injection, measurement, ground testing, 
polarity checks, continuity testing and components activation
  
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.
 
Simultaneously 
uses the hot lead and the ground lead to activate components right in your 
hand
 
Instantly 
identifies positive, negative and open circuits
 
Tests 
for bad ground contacts instantly, allowing you to follow and locate shorts fast 
without wasting fuses
 
Instantly 
checks continuity of switches and relays.
 
Circuit 
breaker protected
 
Built-in 
flashlight enables you to work in the dark
 
Audio 
tone indicator allows for no-look menu scrolling once users are familiar with 
menu tone assignment
 
20ft 
(can be extended via extendable cable port) cable provides excellent 
accessibility to test along the vehicle
 
Extremely 
easy to use and highly reliable
 
Used 
for DC 6-30v cars, motorcycles, trucks, buses, engineering vehicles, vessels, 
tractors, mining vehicles and other vehicles that use DC 
circuits.
  
Top 
Reasons Why You Need GODIAG GT103 Mini Pirt Electric Circuit 
Tester:
 
①GODIAG 
GT103 PIRT Mini Pirt Electric Circuit Tester is a special circuit maintenance 
testing tool which is developed for automobile maintenance workers and 
engineers. 
②It 
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. 
③Moreover, 
its function also covers the detection of relays and fuel injectors as well as 
the cleaning of fuel injectors. 
④The 
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. 
⑤It 
can detect all 0-80v electronic systems, greatly shortening the detection time. 
The connection with the car battery is simple and easy to use.  The 
GoDiag Product Comparison Chart
  
                       
| Items  
  | Description | 
| DC  
Power | DC 
Car battery power(Suitable for 6-30v) | 
| Power 
Consumption | 0.5W | 
| Operating 
Temperature  | -5 
to 50 degrees Celsius | 
| Storage 
Temperature     | -5 
to 60 degrees Celsius | 
| Wire 
Length | 620CM | 
| Shell 
Material  | ABS 
Environment-Friendly Materials  | 
  
Package 
Includes:
 
1pc 
x Main Unit of GODIAG GT103 Mini Pirt Electric Circuit Tester
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