2010 Suzuki Swift Amplifier help

Hello,

I still can not get any power to my amplifier, power light will not come on. I have now instead of grounding it. I have connected the ground wire to the negative of my other cars battery with the positive and remote still connected to my battery/headunit. But still no power. Using a multimetre there is a current coming from the Remote and 12v. So the remote and power are working fine.

Please see attached photos.