I also had this problem and took a while to locate the info in the service manuals. This is what the speaker polarities are: Front Left: Pink + Purple - Front Right: Green + Blue - Rear Left: Black + Yellow - Rear Right: Red + White - Hope this helps :) Also, if anyone was interested in purchasing the Camry 6x9 adaptors from ebay in the US http://cgi.ebay.com/ebaymotors/6x9-Front-S...emZ310013400843 DONT BOTHER!!! The quality of these things is terrible! I bought them on the intention that they would be sufficient but when I got them after 3 weeks they are tacky and are not sealed!! The base part and the top piece are separated with massive holes in them so you will loose all bass and make upgrading your speakers a total waste of time. The only good that came of these were to use them as a template for making the adaptors properly out of MDF! I have just finished installing a set of JL Audio TR 6x9 speakers in the front (will finish the rear's off tomorrow) being powered off the aftermarket DVD/GPS headunit from AusPack (awesome headunit for the price + features). The sound is amazing and clear, not to mention loud as *****!! You WILL hear things you have never heard before in your music :) If anyone is interested I can scan the adaptors into a PDF document and upload them somewhere so people can simply print off the template and then cut them out from MDF. I used 6mm for the base piece and 16mm for the upper piece. It is solid and tight, nothing gets through it. Oh do yourself a favor before you install new speakers, buy a pack of Dynamat Extreme Door kit. Even with the stock speakers it makes all the difference in the world!