Headphone jacks on 2014.5 Interstate silent in one ear
Here's a weird one: On a 2014 Interstate, there are two audio headphone jacks in the cabin, next to the 2nd row of seats. One jack is on the left side near the floor, and the other is on the right side near the disconnect switch. You can turn off the front TV's speakers and use the headphone jacks instead.
On my Interstate, the jacks only supplied one channel of sound. Forget which side, but one ear got full sound, the other ear got nothing. Both jacks.
The dealer just fixed this for me, but had to order and replace some parts.
If you have a 2014 (or similar), and you've not used the headphone jacks, try them out to see if you have the same problem. Seems like Jackson Center may have spec'ed the wrong parts, and I'm guessing it might be a problem on more vans than just mine.