Review on 🔌 EHDIS 4 Pin 12v 40amp Spst Car Relay - Model No.: JD2912-1H-12VDC 40A 14VDC, Pack of 2, Auto Switches & Starters by Richard Carroll

This product works when I switch 12v power from batteries to my HID headlights but it vibrates horribly it sounds like a beehive under my hood. It was a (2) pack and both did the same thing. The only reason I ordered these was to replace the one that came with my relay harness which was vibrating horribly. I think finding a good one is harder than you might think.