Try the support section of www.sony.com for an on-line copy of the manual. I tried but I only found the usage manual, not the installation manual.

Here's what I have from the installation manual of my CDX-MP30:

- blue with white stripe = amp trigger
- white = left front (+)
- white with black stripe = left front (-)
- gray = right front (+)
- gray with black stripe = right front (-)
- green = left rear (+)
- green with black stripe = left rear (-)
- purple = right rear (+)
- purple with black stripe = right rear (-)
- yellow = hot always
- red = hot when key switch is on
- light blue = attenuate input (cell phone, etc.)
- blue = antenna trigger
- black = ground

I hope it's close.

Sixto
95 S420
87 300SDL