HOW TO TEST A RELAY (PROFESSIONAL METHOD) Today I’m teaching how to test an automotive relay step by step using a multimeter and 12V power. 🔹 Relay terminals explanation • 85 & 86 – Coil (control circuit) • 30 & 87 – Load (power circuit) 🔹 Testing procedure 1️⃣ Check coil resistance between 85 and 86 2️⃣ Confirm no continuity between 30 and 87 when relay is OFF 3️⃣ Apply 12V to the coil (85 & 86) 4️⃣ Listen for a click sound 5️⃣ Check continuity between 30 and 87 when relay is ON ✅ If it click