EHDIS 4-Pin Relay with Harness Car Truck Motor Heavy Duty 80A 12V On/Off Normally Open SPST Relay Socket Plug 4 Wire Automotive Relay Model JD2912-1H-12VDC 80A 14VDC,Pack of 1
8 pin relay connection practical video - YouTube
While designing a 5V relay shield (for Arduino), do I need to short a common pin with coil pins? - Quora