Here are some pictures of the factory plugs (2016 Jeep Wrangler Unlimited with Alpine amp ), as you can see, there are only four lines for audio input.
So when you set the fader to Rear, it will have no sound. You need to select "All", then the sound can work well.
And Joying android 5.1 head unit for Jeep Dodge , it comes with a harness which with two connector, one is for basic model, the other one is for model with factory amplifier (with a label of AMP) . Please note this and use the correct connector.
If there is any problem after you installed Joying head unit, please contact us immediately, we will help you solve it.
And in order to solve the problem, we need your help and provide some information of your car. Hope your understanding and cooperation.
Thank you in advance for your support to us.
Have a good experience,
carjoying
