I bought aftermarket radiator fans for my car but couldn't find a switch that could handle the electrical load required. So I bought a 50 amp relay from Amazon and hooked it up to this switch to connect everything. The switch is a little larger than I thought it would be, but it's my fault for not checking the dimensions. The only real complaint I have is that it doesn't come with a schematic so you'll have to google it, but I suspect most 5-pin switches have the same circuit. There's also a blue light that's always on, so you might as well leave it plugged in or hope it doesn't kill your battery. Or find a place to plug it into a power source that will only turn on when the ignition is on.
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