Hey, I have an 07 Grand Caravan that I'm trying to install a aftermarket radio in. The radio powers on fine but I get no sound. I looked under the hood for a bypass to the relay and my car does not have the premium system. So, what you guys think i should try or buy?

 

Did you use proper wiring harnesses? Did the speakers work before?

 

Thank you for the reply. I bought a harness from eBay. When I plug the stock radio it turns on and sound is good