🔧 12V Car Relay Tester 4 & 5 Pin Automotive Diagnostic Tool with LED Indicator Quickly test and diagnose automotive relays with this Universal 12V Relay Tester — a must-have tool for mechanics, DIY car enthusiasts, and auto repair professionals. Designed for fast, accurate, and reliable testing of 4-pin and 5-pin automotive relays, this tester helps identify faulty relays in seconds — saving you both time and money! ⚙️ Key Features ✅ Quick & Accurate Testing – Instantly checks relay health with clear RED (Fail) and GREEN (Pass) LED indicators. ✅ Universal Compatibility – Works with both 4-pin and 5-pin relays, covering most vehicles on the market. ✅ Simple to Use – Connect to a 12V car battery, insert the relay, and press the TEST button for instant results. ✅ Consistent & Reliable –.
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