I have a VW Polo 2003 1.2 and would like to add a speaker to each rear door. I am a complete newbie when it comes to electrical work in cars (actually in most things about cars other than the important simple stuff I suppose). Currently the car has 2 front speakers. I have taken apart one of the rear door trim panels and noticed there is a space where a speaker could be added, however there was no wiring available other than the one that goes to the central locking (I think).
How would I go about passing the speaker wires to the Sony stereo? I was thinking of passing the speaker wires along with the wires that seem to be for the central locking. I assume that doing this would allow me to collect the speaker wire under the front passenger seats. However I am not sure where to go from here to reach the main head unit whilst keeping the wiring well hidden.
Where would the extra speaker wire then be connected to the stereo? I have noticed that there are various harnesses at the back of the stereo. also the head unit has several holes where RCA cables could be plugged into.
I haven't bought any speakers yet and I want to be sure what i need to do before buying them. How do speaker wires look out of the box generally speaking (description is enough)?
Thank you for your help