Wiring diagram for plug in back of stereo (by 2 users)

Left front speakers suddenly stopped working.  This happened about 18 months ago, and I found the wire harness that plugs into the back of the radio/cd player was not making good connections.  I jerry rigged something together with toothpicks and epoxy to make the pins from the player connect securely with the harness, and it worked until about a week ago, when the left side went out again.  Can I get a new harness, or do I have to **** around with this one again, or do you have other suggestions?     Please reply.    - CGraber