1996 Ford Mustang Left Rear Speaker Out
https://www.2carpros.com/articles/how-to-check-wiring
Check out the diagrams (Below). Please let us know what you find.
Suggested Repair
Test the old speaker on the right speaker wire. If it works, cut the left wire about one to two feet from the radio and connect the old speaker there. If it plays, run a new wire to the left rear speaker; if it does not, the CD player is at fault. Confirm the circuit with the radio wiring diagrams and a wiring check.
Conversation Summary
The owner of a 1996 Ford Mustang said the left rear speaker still did not work after replacement and asked whether the wiring or CD player was bad and how to rewire the speakers. The expert advised testing the old speaker on the right speaker wire, then on the left wire cut about one to two feet from the player. If that test plays, run a new wire to the left speaker; if not, the player is bad. A wiring-check guide and radio wiring diagrams were also recommended.



