What does 87 mean on a relay?
What does 87 mean on a relay? 87a. High current (load) Output to other device, normally closed, pulled open when coil is energized. What happens when you touch 86 and 85 on a relay? When you touch 86 and 85 to the battery, the electromagnet pulls the switch contacts together, so the resistance between 30 and 87 should read essentially zero (under one ohm). If it doesn’t, the relay isn’t working. Where does the power come from in a relay? 1 Terminal 86 supplies power to the relay’s internal electromagnet. 2 Terminal 85 grounds the electromagnet. 3 Terminal 30 supplies...