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There's an orange wire in the bottom BCM connector. You de-pin (as appose to cutting the wires) these two, then you can use a butt, crimp connector and a piece of shrink-tubing to connect them to each other. What you have then done is bypassed the BCM. The fogs will now work with the switch as normal, any time the parking lights are on (parking, low, high beams). You can shut them and you won't accidentally leave them on because they go off with the parking lights.

Read the whole thing here, to answer all your questions:

http://mazda3revolution.com/forums/2...ghts-easy.html
 
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