I have a 05 F150 supercrew cab lariat. I need to know what colors are positive and negative for the speakers in the back doors. The left rear has a green w/ black and a wht. The right rear has a purple w/ white and yellow w/ red. can someone please tell me which are the positive and which are the negative? Thank you.

 

Thats odd, those arent the normal colors that should be back there. But it would be the color closest to the tab on the plug.

 

Ok. thank you very much.