I just bought a 2002 quad cab. First Dodge ever and so far I am madly in love.
Just a few minor things I need answers on.

Back right door, power lock and speaker doesnt work, but I heard the wires could be broken. Are they easy to fix, or do I need a new harness?

At highway speed, the back has a wobble/bounce, especially on the driver side. Shocks, add weight, problems? What is this caused from?

The steering wheel has controls for the radio (Infinity system). The right switch is missing, but I can see the wires. Where do I get the controls? Aftermarket to same money hopefully?

Thanks a bunch.