Hey guys I need some help. Yesterday I bought a new stereo for my car and it had a different connector, and I didn't have a wiring harness so my friend and I decided to crimp the wires together (I know it was a stupid idea...)

We followed this guide - 2006 Chevrolet Aveo Car Audio Wiring Diagram

and we connected the corresponding colors to the ones on the new radio, but now the radio fails to even power on...

On the new radio there is no dimmer/illumination wire which kind of confuses me, but I'm pretty sure I have wired them correctly. My friend crimped the wires together just buy twisting them and we taped them with duct tape could that be the problem?