RP4-FD11 No Left Channel Audio

Overview 
This article covers how to fix "not having any left side audio" when installing an aftermarket radio using the RP4-FD11.

Cause: There was an error in a production run of harnesses that has both the left front and left rear negative speaker wires pinned incorrectly in the harness. This is what an improperly pinned harness looks like:

Solution: Because of the different size terminals the wires cannot be re-pinned. These 2 wires should be cut from the harness and jumped to the factory harness. 
1. Cut the white/black and green/black wires from the harness.

2. Extend these wires and connect them to the wires in the factory harness. The white/black wire connects to the wire in pin 21 of the factory harness and the green/black wires connects to the wire in pin 22 of the factory harness.