according to mr haynes pw is to interior light via the time clock and i cant see what the black and grey is.No speakers. The wires are purple with white trace and black with grey trace, both pairs are same
Are they live?
Should have 3 wires if standard. Black for earth and 2 purple ones with different traces - one which is permanently live and one connected to the door switches.
Sorry - no idea what black with grey trace could be.