I have a 2005 X5 and I'm trying to install this POS head unit. I followed the other DSP work around I found on here and it doesn't work. I have the extension cable I bought from Eonon and routed it from the Head unit back to the rear near the AMP. My problem is no sound at all. I'm guessing the head unit is not turning on the AMP

Any help would be great!! EONON customer service is an absolute joke.

Thanks

Kale