![motorcycle - Run switch - 4 pin relay set up with 3 wires - Motor Vehicle Maintenance & Repair Stack Exchange motorcycle - Run switch - 4 pin relay set up with 3 wires - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/dBU5W.jpg)
motorcycle - Run switch - 4 pin relay set up with 3 wires - Motor Vehicle Maintenance & Repair Stack Exchange
MFJ Auto Electrical - 🔻Ⓢⓘⓜⓟⓛⓔ ⓒⓘⓡⓒⓤⓘⓣ ⓦⓘⓣⓗ 4 ⓟⓘⓝ ⓡⓔⓛⓐⓨ👇 🔹4 pin relays use 2 pins (85 & 86) to control the coil and 2 pins (30 & 87) which switch power
![electrical - Why does a relay not short the battery? - Motor Vehicle Maintenance & Repair Stack Exchange electrical - Why does a relay not short the battery? - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/SsVD2.png)
electrical - Why does a relay not short the battery? - Motor Vehicle Maintenance & Repair Stack Exchange
![I followed this diagram to a tee using a 4 pin, 12v 20amp relay. Plugged it all in, I hear and feel the relay click, the radio turns on, but is still I followed this diagram to a tee using a 4 pin, 12v 20amp relay. Plugged it all in, I hear and feel the relay click, the radio turns on, but is still](https://i.redd.it/hjm0dv2kn0991.jpg)