new head unit in 500

[tigs68]

Hi Guys

My partner has bought me a FLI system including amp that fits in the boot of my fiat 500 lovely, we took out the head unit to replace with a pioneer, the problem we have is that when we plug in the connecter from the original hu it doeant power up the new hu, everything is wired up and ready to go just this let to do any help would be apreciated thanks:bang:

 

[volxstu]

Unplug the red wire on the new loom which is on a bullet connector and plug it in to the corresponding yellow one.

 

[tigs68]

Thanks will give that a go