I am looking for a wiring diagram showing the connector pinouts found in the wire harnesses located under the front passenger seat. I understand this is where the factory sub-woofer is mounted if the premium sound system is purchased. I want to add an aftermarket sub-woofer in this same location and need to know which wires are which. I have a Haynes repair manual for this vehicle but it doesn't show enough detail.

If anyone knows where I can get a more complete wiring diagram or has experience with making this modification your help would be much appreciated.