cavi stero plugs

[robert_novaj611]

my pal has a mk 5 cavi and there is only one plug its green and has only four wires a black with a red strip though it and a black a brown n a white is this right or is there eny way of wireing a headunit in

cheers robert
:thumb:

[Asa-James]

That is the power block for the stereo, and what is a mk 5 cavi?