I have a Ford Radio (model 2007) from a Granada circa 1987. It has an
8 pin plug wired thus

*thin red
*thin brown
*yellow
*grey/yellow
*thin brown/yellow
*thick brown
*thin black/green
*thick pink

there is a small separate yellow plug with 6 pins but only one thin
black wire in it. Also a USB type port with a ribbon cable which
presumably is for an amp/graphic whatever?

I have wired the 8 pin plug up and the radio works (tuning etc) just
no sound from the speakers, apart from the odd crackle if I change the
wires around.

Any ideas of the colour code for the Granada?