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Re: Extra fog lights
Jvan:
What ever you want to control the light you would hook to the sense side of the realy.. What you are doing is using the power from one sorce such as the low beam bulb wire to throw a switch (in this case the relay that can take the big load ) and turn on the fog lights. The rely is a electronic magnet with contacts. When it gets a small voltage/ low amp signal to the magnet it energizes the magnet that draws the contacts together that are connected to a larger load and passes the high current to the lights. Not using a relay will fry the switch.
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