How to replace rear wiper motor?

The rear wiper is easy to replace.

Pull out the inside hatch interior plastic lining.
- Once you do this you'll see the wiper motor, wiring, etc.
Unbolt the wiper motor and wiper

Installation is the reverse.

Quite a few of us have deleted the rear wiper, so if you might be able to purchase one off of the many of us.

Or you could go the route by deleting the rear wiper all together

 

Are you sure it isn't an electrical problem leading to the motor? I would expect a failed motor to not work, not be on constantly.

 

Here's a link to a diagram of the rear wiper assembly. Looks like three bolts holding the motor assembly on:

Rear wiper. Fits: TOYOTA | Toyota McDonough Parts

Click on the Full Size Image link above the diagram to see it better.

 

May I ask how you covered the void left after you removed the rear wiper?

 

Yea I don't understand this....

 

You can pick up a hole cover/plug at the hardware appliance store (Lowes, Home Depot, etc.). There are a few DIYs that people have posted on the site. You can find them in the hardware section and come in various sizes.

It basically involves:
- Remove wiper assembly
- Paint hole cover/plug black
- Dab a line of silicone sealant on the back side of the hole cover/plug to seal any possible void between the hole/plug and the window
- Place the hole cover/plug into the area where the wiper arm was and wait a few hours for the silicone sealant to dry.

I don't recall the specific measurement of the hole cover/plug you need to buy, but it should be pretty easy to quickly measure the hole and run into the store to buy the piece. I want to say it's 1"-3/8ths but you really should double check by measuring your rear window.

 

I started out just to remove the rear wiper blade assembly itself for cosmetic reasons.

OK, with protruding wiper drive larger than I thought, I just went ahead and removed the entire wiper motor. It was VERY easy to do.
To remove the plastic back door liners, start with lower first. At sides you will see raised sections to insert a pry tool. pry away and it starts to pop off. Just work your way around popping all 8 or so attaching plastic retainers away from back door. Then starting at the bottom of the mid plastic piece (this one is just below the glass), pry/pop it's lower retainers. Before trying to remove this piece from it's top most area, pull with your hands on the skinny window trim 'just above' where the 'middle piece' joins it on each side. The middle piece is tied into the upper side pieces, so it needs to be moved away from the window enough to remove middle piece from it's 'tabs' into upper sides.

Remove wiring harness and the three 10mm bolts holding the motor and it is out.

The remaining hole is 1.40" in dia. This is 35.56 mm, so a 35 mm plug is just right.
1.375" is 1 3/8" , this should work well too. For now, I just cut a piece of cardboard, inserted into hole and covered both sides with electrical tape until I can get to Lowe's or Home Depot to find a plug.

 

You say it's constantly on. Is it on intermittent, or steady? I too wonder if it's not the motor, rather: a problem with the wiper switch. The dealer could be guessing.