GODIAG GT101 PIRT Power Probe DC 6-40V Vehicles Electrical System Diagnosis/ Fuel Injector Cleaning and Testing

The GODIAG GT101 PIRT Power Probe is a professional-grade multi-function circuit tester designed for all DC vehicle electrical systems from 6 to 40 volts (supports detection up to 0–80V in certain modes). Combining a power injector, volt-ammeter, continuity tester and fuel injector cleaner/tester in one handheld device, the GT101 dramatically speeds up electrical diagnostics and reduces trial-and-error time for mechanics, technicians and DIY enthusiasts.

Key benefits:

• Fast circuit troubleshooting (shorts, opens, polarity)
• Relay and switch testing without a vehicle’s ECU complications
• Fuel injector testing plus on-hand manual cleaning support
• Built-in volt-ammeter and ammeter for instant measurement
• Safety protections (circuit breaker, current trip >20 A)
• Large color display and flashlight for working in any light

Main Functions and How They Help

Circuit Troubleshooting — Quickly Find Opens and Short Circuits

• Use the GT101 to detect positive or negative supply across wires and components.
• Procedure:
  1. Refer to the vehicle wiring diagram and isolate the suspected section.
  2. Probe the circuit to read voltage/polarity and identify open vs. closed paths.
  3. Apply the probe’s output power to the component (e.g., headlight, window motor). If the component runs, suspect an open in the wiring. If it does not, the component itself may be faulty.
• Benefits: Avoids unnecessary component replacement and shortens diagnostic time.

Relay Test — Fast, Accurate Relay Verification

• Remove the relay from its socket and connect the GT101 relay adapter according to the relay pinout.
• Energize the control pin and measure coil current and contact switching.
• Detects stuck contacts, bad coils and intermittent relay issues without swapping relays blindly.

Fuel Injector Test — Diagnose Injector Operation

• The GT101 can pulse or drive an injector while measuring current with the built-in ammeter.
• Normal behavior: injector actuates and ammeter shows expected current draw.
• Abnormal behavior: no actuation or wrong current reading indicates internal injector failure or wiring fault.

Fuel Injector Cleaning — Manual On-vehicle Cleaning Guidance

• The GT101 supports manual cleaning using pressurized cleaner cans (nozzle diameter ~4 mm).
• Safe cleaning steps:
  1. Use a designated injector cleaner or carburetor spray in a well-ventilated open area.
  2. Securely hold the injector and the manual cleaning adapter to avoid spraying the injector away.
  3. Wear protective gear and avoid flames — pressurized cleaners are highly flammable.
• Caution: Follow all safety instructions on cleaning solvents and take required PPE precautions.

Key Features at a Glance

Measurement and Power Injection

• Built-in volt-ammeter displays voltage and current in real time.
• Positive and negative power injection via the probe allows activating fans, relays, motors and other loads.

Polarity, Continuity and Ground Testing

• Instantly identifies positive, negative, and open circuits.
• Quickly finds bad ground contacts and shorts without blowing fuses.
• Audible tone feedback helps no-look menu navigation.

Protection & Usability

• Circuit breaker protection and automatic trip when current exceeds ~20 A to protect the unit and vehicle electronics.
• Built-in flashlight for dark working conditions.
• Long cable (20 ft standard) and extendable cable port for better reach around trucks and buses.
• Rugged, easy-to-use interface with large color display for daylight visibility.

Who Should Use the GT101?

• Automotive technicians and repair shops — speeds diagnostic workflows and reduces customer wait time.
• Fleet maintenance teams — ideal for heavy trucks, buses and industrial vehicles using DC systems.
• Motorcycle and small-engine mechanics — compact and adaptable for tighter spaces.
• DIY enthusiasts and hobbyists who want professional-level diagnostics at a fraction of the cost.

Practical Use Cases & Advantages

Example Use Case — Headlight Not Working

• Step 1: Probe the headlight connector with GT101 to confirm supply voltage.
• Step 2: If no voltage, trace backward to fuse/relay; if voltage present, apply probe power to confirm bulb functionality.
• Result: Faster identification of whether the issue is wiring, fuse/relay or the bulb itself.

Example Use Case — Poor Idle or High Fuel Consumption

• Step 1: Test each injector’s pulse and current draw with GT101.
• Step 2: Identify weak or non-operating injectors; perform manual cleaning where appropriate.
• Result: Restore proper fuel atomization and improve drivability.

Safety and Best Practices

• Always connect to the correct polarity and follow vehicle wiring diagrams.
• Use proper PPE (gloves, goggles) when cleaning injectors or working with pressurized solvents.
• Avoid testing on circuits that may damage sensitive ECUs unless following manufacturer procedures.
• Do not operate cleaning sprays near ignition sources; work outdoors or in ventilated areas.

Technical Specifications (Highlights)

• Operating voltage: DC 6–40 V (detection capability up to ~80 V in some measurement modes)
• Output current protection: Auto-trip above 20 A
• Cable length: 20 ft standard (extendable via port)
• Display: Large color volt-ammeter screen
• Functions: Voltage/current measurement, polarity detection, continuity, power injection, relay test, injector test, manual injector cleaning support, built-in flashlight, audible tone

Conclusion — Why Choose the GODIAG GT101 PIRT Power Probe?

The GODIAG GT101 PIRT Power Probe combines multiple diagnostic tools into one rugged, easy-to-use device tailored for modern vehicle electrical systems. It reduces diagnostic time by letting you inject power, measure voltage and current, test relays and fuel injectors, and support manual injector cleaning — all while protecting vehicle electronics with built-in safety features. For professional mechanics, fleet technicians, and advanced DIYers, the GT101 is an efficient, cost-saving tool that improves accuracy and speeds repairs.

Ready to improve your diagnostic workflow?
Consider the GODIAG GT101 PIRT Power Probe if you frequently diagnose wiring issues, relays or fuel injectors across a wide range of DC vehicles. It’s engineered to save time, prevent unnecessary part swaps and deliver reliable, repeatable results.