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NOTE: In the diagram below, 'fuse A' would not need to be any larger than 1 amp (it MUST be rated to protect the wire feeding the switch from a short circuit). Fuse 'B' MUST be rated to protect the wire feeding the relay (in case of a short circuit). It should also be smaller than the current rating of the relay. This shows how to wire a switch so that you can turn your fans (or any other device connected to the relay) off if you want. You can see that the switch is in series with the remote lead. For the relay to switch on, 2 things must happen. The remote lead must be high (no, not on drugs.. the head unit must be on) AND the switch must be switched to the on position (position B). NOTE: The diode will prevent inductive kickback from the relay coil from damaging the switch contacts.

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