wiring diagrams for older sony headunits

[xsspeed]

any idea where i would find wiring diagrams for older sony headunits

model is cdx f5500x

found this but was hoping for something free
https://www.manualsparadise.com/ShowProductsForModel.do?model=M57219912

[Ae92typeX]

these colours match?:

red: 12v ignition
yellow: 12v constant
Black: Earth
Green: Rear Laft + (stripe -)
violet: Rear Right
White: Front Left
Grey: Front Right

Blue/white stripe: External amp control
Blue: Antenna relay signal/control.

[summin]

If you dont have any luck try either pulling the circuit board out of the casing or, if you have to, bend the bottom of the casing slightly under the area where the wires plug into the unit...Usually the pins are marked.