i need help finding a constant 12v to power my backup camera. i currently have a relay setup and for the power source, i'm fuse tapping into fuse #87, the rear cigarette lighter fuse. but anytime i put the car in reverse, the camera comes on for a quick second and turns off. i don't think the fuse tap is good enough source to power the camera/relay.

can anyone please suggest a good power source for a relay setup to power a backup camera.

car is 2008 550i

thanks in advance.

DoN