There is no auxiliary circuit on this car . You need to use an ignition supply. Spur into the accessory socket . There is an alternative to fit a can- bus conversion kit , but they cost around £40.

If they include the bit to allow the steering wheel controls to be used with an aftermarket radio, they're well worth it. I've used CONNECTS2 stuff on my Peugeot before which is similar.

Thanks Elekie i think you answered my question. This is actually my granddaughters radio and i am fitting it in her corsa having taken it out of the Mazda that she had for 7 weeks. So don't want to spend too much money on it she may not have it for long. Oh to be young again. All threads on the internet seem to connect the ACC red lead to the Cigerette lighter but she just has the accessory socket , 120 watts max, and it only comes on with the engine running. She just won't be able to sit and blast out the music. I'm not sure how this all affects the battery drain and the memory for the presets etc. So i'll go and have a play, thanks for clearing up the aux supply though that has saved a lot of frustration trying to find a connection.

Cheers for now