You need a 4 things

Test light
One tapper
one butt connector
One piece of wire

Take the fog light switch out, find the wire that is power to the lights. When all your lights are on and the test light lights up, hit the high beams and the light goes out, thats the wire.

Cut the wire and put the butt connector on the connector (switch side) the run the wire to your...... defroster, stereo, cig lighter, any power source that work off the key. Key in and on, has power, remove key, no power.

Use the tapper and tap the wire in to that and your done. Just tape off the old power wire.

Hope that helps?