I have an '02 SE and replacing the rear speakers. There is a red and a blue wire that go to the speaker. Which one is + and -.

Thanks for the help.

 

RED is +

 

Thanks. That's what I thought but I don't have an electrical diagram to check. The other side is GRN and BLK W/YELLO. Is the GRN the +?

 

According to the ESM it seems like you have the base (non-bose) system. The wiring diagram for the rear door speakers shows:
Right Hand Door has a wire color of L and shows an arrow going into the speaker (presumably this means its the positive), and wire color of P with an arrow out (presumably negative). The Left Hand Door has a wire color of LG (Light Green?) and shows an arrow going into the speaker, and a wire color of B/Y with an arrorw coming out.

The Bose system has the same color indicators for wiring although in the Bose diagram it shows LG and L to a 1 (on the speaker) and B/Y and P to a 2 (again on the speaker).

The woofer is the only speaker with possible Blue and Red wires.

 

You know how everybody was complaining about how hard it was to remove there factory radio, Well mine was easy since mine where bolts and not screws.

 

Check here for the Vehicle Wiring Info on the 2k2.