power window problem

My wife's 2000 Civic has powered windows. When the windows are mover past
the half way down point the motor struggles to move the window up. I
unhooked the window and the motor seems to move fine, but with eh window
attached it really struggles. I have oiled the slide and cable that is used
to move the window. Has anyone had this problem and what does it take to fix
it.
George Taylor

 

I'm not familiar with the motors for the windows, but I am familiar with
drives and drive systems. It sounds as if there is something binding the
drive mechanism that with the additional weight of the window it has a hard
time handling (a gear or coupling or the track itself).

It could also be the motor. Most small DC drive motors are of the brushed
type (at least the lower cost ones). If the brushes get worn (or are
defective) or if the interior of it gets a lot of dust from the brushes or
other sources it can weaken the field that is used to drive the motor
windings.

 

Hi,
Alignment?
Tony

 

I agree with the intelligent poster that said the window might be binding
on something. I just wanted to add that this could also mean that the
motor is about ready to stop working. In many cases--with electric
motors--they run poorly prior to the point where they stop working. In
many cases, it's cheaper to replace the motor than it is to pay someone to
repair the motor. If you have to replace the motor, your best option is to
go to a auto junk yard and buy it. If you can install it yourself, you
will save lots of money. Don't bother buying a replacement motor until you
determine whether or not the window now in the door is binding. If it is
binding, a different motor will not solve the problem.

 

If it is a brushed motor, and you can get the motor manufacturer and model
number, replacement brushes are only a few dollars (usually <$10, even for
some of the 40-50HP DC drives I've worked with) and can be ordered from
industrial companies like Dodge Newark.

 

My own experience w/dragging PW motors (bogging down under load) was that
the armature contacts were loaded up with grease and hence the brushes
couldn't achieve good contact. Dunno what you could use today, but 10
years ago a couple good shots of Blue Shower (1.1.1 TriChlorethane) would
flush out the goo.

WD40 as a cleaning/flushing agent (not as a lubricant) might work.

--
Help Support Satellite Radio!
Your local radio broadcasters through their powerful NAB lobbyiests
are currently pushing a bill through Congress that if passed, would block
the Satellite Radio services from carrying local content (Traffic & Weather)
Please call your elected representatives at (202) 225-3121 and urge them to
Oppose HR 4026. We need your help, please.
<http://www.xmradio.com/grassroots/index.jsp>

 

Some electronics non residue contact cleaner may work as well.