I have a 2008 Ram 1500 trx4 with the 4 speaker system. My truck doesn’t have accessories such as steering wheel controls, etc. I’m installing a double din FH-S501BT which is a very simple system, has CD player and Bluetooth that’s about it. I need help with what wiring harness to buy because a lot say they aren’t compatible with my truck and I can not find any that are. I am against putting an interface in because it’s unnecessary. Please help!