Compare webshops (1)
Sponsored links · Some shops pay us a fee
Shops with other sizes
Automatically detects 12V/24V relay tester. The OBDResource car relay tester needs no manual voltage adjustment. Just slot your relay in, and it will automatically check the continuity for both 12V and 24V units. It saves time on vehicle fault‑finding and delivers quick on‑site diagnosis, suitable for both professional mechanics and DIY enthusiasts. Wide‑ranging pin compatibility for numerous relay types. The automotive relay tester supports 5 different pin configurations, covering over 20 common relay types, with switchable 4‑pin / 5‑pin modes to suit both garage workshops and home repairs. It works with cars, light commercial vehicles and trucks, making it a handy car relay diagnostic tool for tracing car relay faults. Wireless and portable design, suitable for various scenarios. Wireless relay tester runs off 3 AA batteries (not included) for testing. You may also power it via Type‑C using power banks, laptops or mains adapters. Relay tester does not rely on vehicle battery power, making it suitable for bench checks, roadside emergency repairs and home‑garage work. Dual audio‑visual alerts with built‑in low‑battery warning. Red‑green LED lights and a buzzer give clear test signals: a beep sounds as the test begins. Once complete, a green light shows the relay is working properly, whereas a red light together with a buzzer alarm signals a fault. The car relay checker also has an in‑built low‑battery alert, using LED illumination and intermittent beeps to remind you to change the batteries promptly. Supports both NO and NC test modes, no manual circuit analysis required. Ditch the tedious step of working out a relay’s internal wiring, which is needed on standard testers. The vehicle relay tester can test both Normally Open (NO) and Normally Closed (NC) relays directly, helping you quickly diagnose faults with starter relays and other common‑type automotive relays.