12v power only with engine running source?

[awdtsi]

Hi, I am looking for a source of 12v power only when the engine is running. I don't want it to have power when I hit the ignition button but don't start the car. It's for a turbo scavenge pump so I don't want it pumping if I happen to have the ignition on but engine not running.

Does anyone know a source in the egine bay?

Any help is much appreciated!

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