the wireing loom for the front seats if not visible then its not installed. the rear windows are easy to change all you need is to visit a salvage yard to get the motors, mechenisums, wireing. the all you need to do is tape the windows closed from the top then remove the few holdig bolts the wind the mech down while releasing it from the window so its easyer to removethn just the replace withe the motor ed version, and wire the electric's up to a power, and earth.
Hi, Try checking that your front disks are not worped, or the all the joints connected to the hub i.e wish bone, anti roll bar, track rod ends (steering arms) that should help