Review on ESUPPORT 16mm 12V 3A Car Purple LED Light Power Metal Push 🚗 Button Toggle Switch Socket Plug Latching Black Shell: Illuminating Control for Automotive Applications by Matt Morgan

Based on feedback and questions, I give this product 4 stars. It would be five if the seller gave more information about the harness wiring. Having gathered information from other similar sellers and reviews, I will do my best to provide a description below to help: Black wire - negative Red wire - positive side of LED Green wire - ground (C) on relay switch. Typically used as a relay output, going to the input of your device. Connect the red wire (LED) to the green wire if you want the light to come on when the button is pressed. The blue wire is a normally open (NO) relay switch. Normally used as the source (battery voltage) connection that contacts the green wire (C) when the button is pressed. Note. Normally the yellow wire is not used in this application. The yellow wire is normally closed (NC) on the relay switch. Normally used as the source connection (battery voltage) that breaks contact with the green wire (C) when the button is pressed. The yellow wire (NC) contacts the green wire (C) internally when the button is not pressed and then opens the circuit when the button is pressed. This configuration is used when you want your device to connect to say; 12 volts all the time and only turn it off when the button is pressed. In this case connect the red (LED) to the green wire (C) and the LED will light up until the button is pressed. Note. Normally the blue wire is not used in this application. Other uses may be associated with this scheme, but these are typical. Hope that helps.