The rear washer motor is located on the underside of the hatch under the plastic. Remove all screws then work the plastic out of its hidden clips. Although I do not have a rear wiper so maybe the plastic panel is different then my car, yours may have a removable panel.
your lc shouldn't have a rear washer motor. You should have two lines coming off your front(only) washer motor. If your rear isn't working then you might have a frozen line or your washer motor is going bad or possibly a bad rear wiper/washer switch.
I had a motor go bad on mine so i'm using a junkyard motor from a gl model accent so I don't have a working rear washer.
If your motor is bad go to car-part.com and you should be able to get a used tank with motor for 30-40 bucks. Just make sure you get a gs model motor since they are the only 00-02 model with a rear washer/wiper setup.
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