Join Date: Jun 2016
Location: Living on the east coast, Cape Breton as you may have guessed.
You've got what seems to be a bad connector in the wiring between the back of the stereo and the speaker it's self. I had dealt with much the same problem in the past with both front speakers. You could try checking where the door opens, between the hinges that tube which contains the wires for the speaker, and power windows and such(if you've got them) there is an actual connection where one would separate those wires should the door need to come off...so you wouldn't have to cut the wires, simply dis-connect one door and re-connect another. Don't remove the door, of course, simply find that plastic connection thing and check the wires themselves. You may find the problem.
When my speakers crapped for the second time I did little recon on the wires and found the problem to be that connection. If you haven't solved the trouble already, you might consider this a possible solution.