I have had intermittent problems with my two Kwikee power storage trays. In the last few weeks, they have not worked at all, so I thought I would share with those of you who have them what could go wrong, and how to fix it.
The power tray will not move, but I hear a click. I traced wiring and found everything was good. Next, I manually moved the slide so I could access the components. These powered trays use common power window motors to move the tray back and forth. I finally found that the motors that move the tray were good, however, there is something called a "stop motor" which moves the tray to an assigned position, so it won't damage the doors. This motor has an elliptical wheel attached that moves the slide lock down so the tray can be released from its locked position when it needs to move.
This motor that controls the slide lock movement failed, and because the slide lock would not release, the electrical limit switch that is attached nearby would not allow voltage to flow.
If this happens to you, a quick way to test is to position a screwdriver between the rails where the slide lock resides. Push the slide lock down while another person taps the movement switch on the door. If it moves, then you will know what is wrong.
The fix is actually pretty easy. Use an 8 mm wrench or socket ( or 5/16th ) and remove the bolts holding the plastic shroud over the electrical and motor area.
Now use the same tools to remove the motor. Disconnect the wire harness and pull it out.
You can fix the motor by pulling it apart and cleaning the brushes and commuter with very fine sandpaper or a pencil eraser. To reassemble make sure you pull the brush block off the main unit and use a small flat screwdriver to push the brushes in to clear. Then install the gear end. I don't bother to test these motors afterwards since I've done twenty of them over the years for the steps, and my vehicle's power windows.
The next step is to reconnect the wiring to the motor, but not install it. Now the next part is to time the motor so the elliptical part is in the correct location to push the slide lock down before you put it back in. I did this by laying on the tray and using the remote to move the tray out. The motor moved and the elliptical part finally moved to the correct location. Then I reinstalled it and tested the result.
Below are two images to better describe the area.
http://www.crewchiefpro.com/kwikeeProblem1.jpg
http://www.crewchiefpro.com/kwikeeProblem2.jpg
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