2001 Odyssey can't manually open power sliding door

I used an eraser and cleaned the contacts and now the door opens with the manual handle, but still does not close with the handle. How do I test the cable that closes the door when the handle is pulled? My local dealership only wants a mere $400 to replace the whole door latch remote assembly.

William Wiles said:

Assuming you can't open/close with the door handle. If that is the case it is two different problems. To open a signal is sent through the contacts on the front of the sliding door. You need to clean the contacts with a mild abrasive, pencil eraser or fine (600 grit) sandpaper. For closing there is a rod that goes from the handle to a switch in the lower rear corner of the door frame. When the handle is pulled the rod presses the switch starting the door closing. The problem can be caused by a lot of things, misaligned door, door rollers missing, switch bad or damaged, rod misadjusted, etc.

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