Need Help Finding Ignition Switched Power Wire

[Robb235]

Need a little help... I know basic things about electronics, like relays, soldering, that kind of stuff. But beyond that, I'm no expert. I need to find a power wire behind the dash or steering wheel that gets power only when the ignition is on. No power when ignition is off. Tapping into this wire, it would only be used as the signal to activate a relay, so there's not going to be a large draw on this wire. Can't use the cigarette lighters because they're now full time hot. Is there another easy-to-access power (that's hot only when ignition is on) that I can use?

 

[weekendclimber]

There is the one that turns the radio on. That would be my first choice.

 

[Robb235]

There is the one that turns the radio on. That would be my first choice.

Not to sound stupid, but which one is the power wire? It's been a while since I've looked at the back of my radio, but I remember there being several different colors.

 

[weekendclimber]

No worries. There are no stupid questions. You could use either the gray with black (acc), or pink with blue (amp).