MR2NortE

yeah, if you are unsure i strongly emphysize getting an auto sparky who knows his shizzles about your model car to check it out cos like i found out on my previous toyota, electrical jobs, if not done correctly can fail you warrant of fitness and give you hours of headaches.

in regards to wires backwards is semi correct and almost there but to point out that basically, the window wiper motor is just a motor with two wiper arms attached. the motor is connected to an alternator circuit which makes the motor spin one way then back in the opposite direction (wiper arms go up and down and up and down). so if yours going down, then up, then down then up, either the alternator for the wiper motor is ****ed or the wiring is ****ed.