Installed a new Pioneer stereo that my kids got me for Christmas.
And decided to go ahead and replace the rear speakers with some Rockford Fosgates since they're so easy to get to.
I used a Metra wire adapter to connect the speakers which was a waste of time. The plugs wouldn't fit the speaker connectors so I had to cut them off and crimp on different ones. At least the extra length made it easier to plug in and mount the speakers.
The only other problem was when I turned the stereo on there was no sound. The power plug for the factory stereo had a dark blue wire coming out of it. If you see that, you have a factory amplifier. I had to use the blue remote wire coming out of the Pioneer stereo and connect it to the blue wire that went to the factory stereo to turn the amp on. Once I made that connection everything worked.