Car: 10G 1.5 Civic Prestige
Join Date: 10th October 2015
Location: Bexhill, Sussex
Thanked 221 Times in 213 Posts
Hi, and welcome to CivInfo Enfo.
I can't help with the colour code, but you can fairly easily detect a wrongly connected speaker pair polarity (phasing) by listening to them.
Connect both fronts but not the back (or turn the back vol to zero) and set L/R balance to mid position.
Play a known mono source.
If the speakers are correctly phased, the sound will seem to come from between them.
If they are incorrectly phased, the sound will seem to come from both sides.
Swap the connections on one speaker and listen for the difference.
Once you have done that and got it right, turn up the front/rear speakers to mid and set the L/R balance fully left and repeat the test. If phased correctly, the sound should appear to be between the two speakers. Etc. etc.
Repeat for the right front/rear speakers.
Once you have heard the difference, it's a doddle to get them right, but you do need a mono source so that exactly the same sound is coming from both speakers. It can be done with a stereo source, but is considerably more difficult.