On Off Auto Switch

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derring-do

Member - Posts: 1

Joined: October 10, 2014

Location: Colorado, United States

Posted: April 22, 2016 at 10:41 PM / IP Logged

Hey, sorry, I've tried searching but not sure what I'm really looking for.

I want to safely use this switch (image below) as an on (HIGH), off, auto (LOW). The circuit is running an AC Condenser Fan.

I want the auto setting connected to the battery and grounded by the AC Pressure Switch (so it will run after the vehicle is off).

The on setting will be a normal circuit with switched 12v and ground.

I can't seem to figure out how to do this without several relays or bringing battery power directly to the switch.

If using the switch to switch the ground safe? The fan is ~10amps.

Any help would be appreciated.

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