Jfind Jf107 Automotive Relay Tester is a versatile diagnostic tool designed for quick and accurate testing of standard automotive relays. Supporting both 12V and 24V systems, it is ideal for passenger cars, trucks, buses, and heavy-duty vehicles. This tester helps technicians identify faulty relays within seconds, reducing diagnostic time and preventing unnecessary part replacements. Key Features Dual Voltage Support: Works with both 12V and 24V electrical systems, making it suitable for light vehicles, commercial vehicles, and industrial equipment. 4-Pin & 5-Pin Relay Compatibility: Tests the most commonly used relays found in fuel pumps, starters, AC compressors, lighting circuits, ECU systems, and more. Accurate Relay Diagnostics: Checks coil status, contact switching, response speed, and internal faults such as sticking or open circuits. Simple Operation: Easy plug-in relay slot and clear indicator lights provide instant pass/fail feedback. Stable Power Input: Connects directly to the vehicle battery for consistent testing conditions. Durable & Portable: Compact, impact-resistant body designed for daily workshop use or mobile diagnostics. Technical Specifications Feature Details Operating Voltage 11V – 25V DC (Auto-detects 12V or 24V) Relay Compatibility 4-Pin and 5-Pin Automotive Relays Coil Resistance Recommended ≥ 20Ω Testing Speed Full diagnostic in under 15 seconds Safety Protection Short-circuit and reverse polarity protection Material Industrial-strength ABS Plastic Comparison: JF107 vs. Standard (CNBJ-707) Feature Jfind JF107 Standard (CNBJ-707) Voltage 12V & 24V 12V Only Relay Size Supports Larger/Industrial Relays Standard Size Only Pin Detection Advanced Auto-Detection Manual Toggle (4/5 Pin) How to Use (Step-by-Step) Power Up: Connect the black alligator clip to the battery negative (-) and the red clip to the battery positive ( ). The red LED will light up to indicate the tester is ready. Select Pins: Use the selector button to choose your relay type: Button Up for 4-pin relays, or Button Down for 5-pin relays. Insert & Test: Plug the relay into the corresponding socket and press the “TEST” button. Read Results: Green Light: Relay is healthy and passed all timing/consistency checks. Red Light: Relay is faulty, showing inconsistent performance, or has damaged pins. Package Contents 1 x Jfind JF107 Main Unit 1 x Set of Heavy-Duty Alligator Clips 1 x User Manual
