KIMISS 2PCS Alloy Reversed Polarity，LED Negative Converter Polar Negative Switch Harness Adaptor Reversed Polarity for H4

okay this is a video to show how to power up a load whether it be a light or a trunk release or a power window or a dome light or something I'm gonna power up something on your vehicle with an output from an aftermarket alarm or like a remote start box it's something like that usually the outputs out of those boxes are negative 12 volts negative and most things in vehicles need our switched 12-volt positive so how do you turn on and off an accessory with a negative output from a from an alarm or a remote start box when you do with a relay so this is l4 load this is the load weather in our case I'm going to show you an example using a light bulb but it could be like I said a trunk release or whatever maybe you take a relay like this standard automotive style relay and you've got the center posts are no different than a basic switch if you look at the back of a toggle switch there's eithe