Electric Fan keeps draining Battery Issue

I recently replaced my fan with an electric one and installed a Thermoswitch to turn it on when the engine is hot. But I think even though the fan isn't running, it still sucks up the battery's juice. I have the fan wires connected directly to the battery terminals. I know this isn't the right way it should be connected but I don't know the correct way of wiring it so it will only be active when the key is turned.

Any help on where I can wire it so it will only turn on when the key is on?

A good way to wire the fan is to tap into your fuse block on a circuit that just comes on when the key is on RUN. The power windows fuse is 30 amps and only powers up when the key is on. I think that would be plenty of juice to run your fan, providing you don't have power windows. This is the circuit I used on my Escort to power some accessories. I used the fuse to hold the wire in place then I put another 30 amp fuse in-line to the lights. Of course the best way to do it would be to put the fan on a relay, hook it up to the battery and wire the relay so it only comes on when the key is on. That way it wouldn't pull too much current and overheat the wiring. You can get a universal relay at the parts house. If your fan draws more than 30 amps this would be the way to go.

Thanks for the advice

Thanks for the advice

Thank You! Always glad to help.