I got a new JVC deck installed in my crx, and got alpine speakers which I was going to do myself, but I ran into a problem, my speaker wires in the door have no colors such as black or red as they are both completely clear, and they are both exactly the same size, how do I find out which one is positive?

 

none of the clear wires are marked with a thin white line or black ect. ?

if not, you can just do one speaker at a time and connect the wires to it and turn up your radio a little. then reverse the wires and which ever one of the two sounded louder that's the correct way. then just use something to mark it so you'll know from then on.

there will be a noticeable difference in the sound

 

Depend who install your deck, if it professional done, then check the marking off your speaker, it should have +- on them, or smaller male connector for -, and if you install it yourself, you could always check the back of your deck for the correct wires.

 

you could also do a continuity test with a multimeter