Topic: Power Window
in Forum: C3 Electrical
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Have a 78 passenger side window goes up and down really sluggish
drivers side works well with no problem. any ideas on why it has
to work so hard. or where to look. to correct the problem. could it be
maybe motor is tired or ? Any help would be appreciated.
&nbs p; Mike
&nbs p; Mike
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Moderator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Could be the motor, or could be that the regulator needs a little lubrication. Pull the door panel off, and see if the regulator looks really dry. There are several points where the mechanism pivots(sissors), and sometimes a little WD-40(or similar product) will help. Make sure the tracks(where the rollers "roll") have a little "white" grease on them, and that what is there is not hard as a brick! If lubricating the mechanism doesn't help, it may be time for a new motor
.
Does it matter if the door is open or closed? Sometimes, the weatherstrip causes the glass to "drag" as you roll the window up. If it works better with the door open, use a little silicon grease,(made for rubber weatherstrip), and see if it helps the glass go up better.

Does it matter if the door is open or closed? Sometimes, the weatherstrip causes the glass to "drag" as you roll the window up. If it works better with the door open, use a little silicon grease,(made for rubber weatherstrip), and see if it helps the glass go up better.


Joel Adams
C3VR Lifetime Member #56
My Link
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
The motors are usually good or bad. It is possible but not probable
that there might be a bad ground. Most times it is binding in the
regulator or weatherstipping interfering with the glass. Do you here
any grinding or knocking when the window is traveling up and down? If
so, it is probably in the regulator. Someone here will be able to help
you. I am amazed at the knowledge found here.
Good Luck!
Scott
Good Luck!

Scott
there is no grinding or weird noises just goes up and down real slow,
sounds like a plan to do this weekend take the panel off and lube up
all the rollers and pivot points and go from there. does not matter
also if door is open or closed still the same. thanks for for the info
it is greatly appreciated.

Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
replaced mine on passenger side.. what a difference.. $50 Advance. Had to modify the wiring as I didn't like the way the wires connected with the universal aftermarket..(seemed too loose). Will be doing driver side soon...
Make sure you have a good connection at the switch too. And make sure the wires are secured and out of the way of the emergency brake... I had the wire get caught by the emergency brake once, and it cut it in half...
Lifetime Member #86
USN 1966-1970
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USN 1966-1970
WestPac 67-68 Tet I&II
Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"

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in Forum: C3 Electrical
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