# How would I add a relay to turn on a new device when the car is on?

**URL:** <https://forums.speedlife.net/t/how-would-i-add-a-relay-to-turn-on-a-new-device-when-the-car-is-on/27716>\
**Category:** NYSpeed Automotive\
**Created:** [April 16, 2007, 11:57am UTC](https://forums.speedlife.net/t/how-would-i-add-a-relay-to-turn-on-a-new-device-when-the-car-is-on/27716 "2007-04-16T11:57:32Z")\
**Posts on this page:** 1\
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**Author:** ![MPD47](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mpd47/32/7383_2.png) [@MPD47](https://forums.speedlife.net/u/MPD47)\
**Post date:** [April 16, 2007, 12:06pm UTC](https://forums.speedlife.net/t/how-would-i-add-a-relay-to-turn-on-a-new-device-when-the-car-is-on/27716/3 "2007-04-16T12:06:35Z")

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Could always just tap into the “switched power” wire on the back of your ignition switch.

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