Question about 1998 Toyota Sienna
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Posted on Jan 02, 2017
SOURCE: 1990 camry power window problem
It is rare that the power window relay will fail. Personally, I would look to see if there is power at the master switch on the driver's door. Anywhere. If the is NO POWER, you have a broken wire between the door & the LF kick panel where the wires come thru the body into the door shell. If there is power, the master switch is narmally the culprit
Posted on Sep 08, 2008
No won't be fuse. My guess is there is something faulty with the main controller. You could probably verify this by trying the switch on right rear passenger door. If it works there then the problem is at the main controller in the driver door. Could be a loose wire or the switch itself is broken.
Posted on May 13, 2009
I just repaired a 1999 Corolla (160,000 miles) window regulator with the same problem. I checked the motor commutator windings for shorts and the motor was OK. The brushes were still good. The motor is built like a clock - extremely well made with almost no indication of wear. Bench testing showed that the motor would not rotate once it had been run for a few seconds.
Elsewhere on the Internet someone mentioned a PTC Thermistor. This was exactly what was causing the problem. This is a special type of resistor "in series" with the motor that increases resistance when hot. It prevents the motor from drawing much current when stalled at the top or bottom of the window travel or in event of a jam, etc. The thermistor doesn't look like a standard "Radio Shack" part. By pulling off the motor top the magnets and commutator pull out. The PTC Thermistor is the two large copper plates separated by a silver looking material about 0.001" thick that are in series with one of the brushes. To fix, short out the thermistor. I tested with a small clip of copper wire. I made a permanent fix by soldering a jumper from one plate to another. During assembly, don't break the brushes.
The power window works great! I don't need an "electronic minder" to stop power to the motor at the top or bottom of the travel; I can do that. I don't intend to place my head in the window and push the button. If you have kids, this fix might not be for you.
Posted on May 31, 2009
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