Lost all speakers but not subs
To start off I have a Pioneer double din with the stock speakers and some subs. Everything has been working good for the last couple years. I drove the truck today and it was fine. I came home and went to go leave again and when the deck turned on it was just subs. Everything on the deck seems to be working fine. I noticed when the deck turns on the rear right speaker will crackle but no other ones will. Any tips on where I should start looking. Iv tried resting the deck by pulled battery negative but that didn't work and it got dark. Maybe for some reason I got a bad connection in the back or maybe the deck is just toast. any help will be appreciated.
2002 Ford Ranger Edge 4.0 V6 4x4