12V Automotive Relay Tester – Universal Electronic Relay Diagnostic Tool.. For Sale

RT01 12V–24V Automotive Relay Tester & Digital Voltage Detector

Diagnose faulty car relays in seconds without expensive guesswork! The RT01 Digital Relay Tester is a fast, reliable diagnostic tool engineered to check both 12V and 24V vehicle battery power while testing standard 4-pin and 5-pin automotive relays.

Equipped with an automatic 10-cycle action release test and a real-time digital voltage display, this tool evaluates relay pin configuration, response speed, and contact consistency. Powered directly by your car battery—no internal batteries needed!

• Real-Time Battery Voltage Display: Features a bright digital display screen to instantly monitor battery voltage levels (11V–25V range) before testing.

• Automatic Diagnostic Cycling: Performs 10 automated open/close cycles to measure response time and contact consistency for thorough accuracy.

• Universal 4-Pin & 5-Pin Compatibility: Features built-in sockets designed for standard 4-pin and 5-pin general automotive relays.

• Instant LED Status Readings: Green LED indicates a fully functional relay; Red LED alerts you to incorrect pinouts, excessive delay, or internal coil failure.

• Plug & Play Operation: Heavy-duty insulated alligator clips (42cm length) draw power directly from your car battery—no extra batteries required.

• Compact & Rugged ABS Shell: Made with high-impact ABS material built to withstand everyday garage and field maintenance work.

1. Connect Power: Attach the black alligator clip to the battery negative (-) terminal and the red clip to the positive (+) terminal.

2. Power On: The red LED indicator illuminates when the unit is powered and ready to test.

3. Select Socket: Check your relay type and insert it into the corresponding 4-Pin or 5-Pin socket.

4. Run Test: Press the \"TEST\" button.

5. Read Result:

   • GREEN LED: Relay passed all tests (Normal operation).

   • RED LED: Relay failed (Damaged, abnormal response, or non-standard pinout). data-path-to-node=\"18\" style=\"padding-inline-start: 32px; font-family: "Google Sans Text", sans-serif !important; line-height: 1.15 !important; margin-top: 0px !important;\">

   • Model: RT01 Relay Detector

   • Battery Voltage Range: 11V – 25V (12V & 24V Systems)

   • Coil Resistance Range: ≥ 20Ω

   • Socket Compatibility: Standard 4-Pin and 5-Pin Automotive Relays

   • Clip Length: 42 cm / 16.54 inches

   • Dimensions: 139 mm × 63 mm × 27 mm (5.47\" × 2.48\" × 1.06\")

   • Package Includes: 1 × RT01 Digital Relay Tester, 1 × User Manual