2002 Dodge Ram 1500 Speaker wiring

I am trying to find out the polarities of the speaker wires for the front and rear doors in my quad cab.

if your changing just speakers take the old 2 wire harness from the stock spkrs and take a small AA battery or 9v preferably AA to prevent damage to the stock spkr. solder two leads +- to the battery wich will come in use later if you ever change spkrs again on another car. now touch the two leads to the stock speaker 1 of 2 ways until it pushes outward that is the + lead do the same on the other side to make sure there in phase.