What the..trying to change from stock radio and i found out why the rear speakers don't work. Why do i have wires only for front speakers on my golf 4 1.9tdi 2003? :
Focal (IS VW 180) - 2 Way Volkswagen Components Speakers For TIGUAN/PASSAT/ GOLF
VW Golf IV car speakers upgrade loudspeaker kit front doors - Car Hifi Radio Adapter.eu
THE BEST SOUND QUALITY EVER !! VW SPEAKERS PLUG & PLAY SYSTEM TEL :21400400 GOLF 4 GOLF 5 GOLF 6 GOLF 7... - EXTREME Car Audio (Automotive Sound and Lighting Technology) | Facebook
VW Golf IV car speakers upgrade kit front - rear doors MB Quart - Car Hifi Radio Adapter.eu
Volkswagen Golf IV 1.8T Speakers - ECS Tuning
Focal Is VW 165 Speaker 16,5 CM Combo Compatible With VW Golf 4 (1J1/1JM) | eBay
Beste speakers voor VW Golf IV 1998-2003 - Voordeuren/achterdeuren - Caraudioshop