where do i hookup the ATT wire in a 1998 Ford Expedition?

Question

this is for a sony cdx-gt510 i can hear sound form the subs and inside speakers when the radio is on, but when i put in a cd i can only hear sound from the subs none of the panel or door speakers will sounds. please help!

Answer 1

Don't hook up the ATT wire; it's only used to mute the head unit when used with a hands-free phone kit, for example.

At the back of the Sony head unit, you have a dark blue wire and a dark blue wire with a white stripe. Remove whatever is connected to the solid dark blue wire, and attach it to the blue/white wire instead.