C3 Vette Registry - The Best Resource on the Net for C3 Vettes! C3 Vette
Forums -> C3 Electrical
Not Logged In! Login or Register!  Users Online: 20 / Help 
Features  Find C3 Parts on ebay in only 2 or 3 clicks!  | Add YOUR C3 to the Registry

Supporting Vendors
CorvetteClothing.com
Bair's Corvettes
Volunteer Vette Products
Mid America Motorworks
VetteBookStore.com

C3 of the Month
None Current
Enter Yours Today!
Online C3 Show
13
C3s are Registered

Vanity Plates
1 UNEK82
Karla's82vette
Featured Links

Buy Now
Corvette Fuel Injection & Electronic Engine Control: 1982 through 2001
Corvette Fuel Injection & Electronic Engine Control: 1982 through 2001


Corvette Magazine - $19.99 for 8 issues
Corvette Magazine
Only $19.99 for 8 issues


The Corvette Factories: Building America's Sports Car (Hardcover)
The Corvette Factories: Building America's Sports Car (Hardcover)


Motor Trend - $5 for 12 issues.
Motor Trend
Only $5 for 12 issues.



| Hide Signatures and Profile Pics

 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
8/1/18 4:50pm - Original Message: 'power windows have me stumped'
lilenterprises
Limited Member
- Send Private Message


Joined: 8/1/2018
Posts: 2
I'm troubleshooting the drivers side window and am completely baffled.  When I pulled the window motor, it was easy to see the problem.  The spring snapped and burned up the motor.  I ordered a new motor and spring.  Using a voltmeter I have 12 volts at the blue and brown wire in the door when using switch in console.  When I hook up the motor, I can get the up side to work but not the downside.  I'm lost because they both work when testing with the voltmeter.  In the corvette shop manual it recommends replacing switch when only one side works but that doesn't make sense to me if they both work when tested.  What am I missing?  It's a 1979 coupe.

|UPDATED|8/1/2018 1:50:57 PM (AZT)|/UPDATED|
 Reply Reply  Quote Reply w/Quote
 
Support C3VR!
Suport our advertisers
8/1/18 5:43pm - Reply: 'Re: power windows have me stumped'
73shark
Standard Member
- Send Private Message


Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 493
Welcome to the forum. Can you back probe the connector after it's connected to the motor? If you still have 12 volts there but the motor still doesnt work then I would suspect the connector first or the motor second. To check the motor, you can connect it to your battery or other 12 volt source directly to see if it runs in both directions.

|UPDATED|8/1/2018 2:43:13 PM (AZT)|/UPDATED|


____________________________________

1973 L-82 4 spd

 Reply Reply  Quote Reply w/Quote
8/2/18 9:45pm - Reply: 'Re: power windows have me stumped'
lilenterprises
Limited Member
- Send Private Message


Joined: 8/1/2018
Posts: 2
Thanks for the info.  That is exactly what I did and found that the switch wasn't working correctly.  I've ordered a new one and am certain that will fix the problem.  Not a fun job installing a power window motor on a 79.  Now I'm on to the power locks.
 Reply Reply  Quote Reply w/Quote
8/3/18 12:12am - Reply: 'Re: power windows have me stumped'
73shark
Standard Member
- Send Private Message


Overland Park, KS - USA

Vette(s):
1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day.

Joined: 7/9/2003
Posts: 493
You're telling me. I put factory air and power windows on mine about a year after I bought it new. Not a lot of fun, especially the windows.

____________________________________

1973 L-82 4 spd

 Reply Reply  Quote Reply w/Quote
8/6/18 3:34pm - Reply: 'Re: power windows have me stumped'
dhrinda Lifetime Member
Lifetime Member
- Send Private Message


BLOOMSBURG, PA - USA

Vette(s):
1972 T-Top

Joined: 8/29/2002
Posts: 3
The thing you have to remember is your meter has a really high impedance. which means it puts almost no load on the circuit. At 9 VDC and no load it will show 0 or very low ohms which could mean a good switch, but if the contacts are burned , when you put 10 or 12 amps across the contacts of the switch no current will flow and the motor will not work.

____________________________________
 Reply Reply  Quote Reply w/Quote
8/7/18 9:05am - Reply: 'Re: power windows have me stumped'
vettejack Lifetime Member
Lifetime Member
- Send Private Message


Titusville, FL - USA

Vette(s):
1977 Coupe (White), 1982 Coupe (Silver), 2006 Convertible (Victory Red). NCM Life Member #2221.

Joined: 12/19/2007
Posts: 150
One thing my mechanic told me about C2/C3 windows being 'slow', before and after motor replacements, is dealing with entire window assembly even though you are only focused on 1 issue. It will pay off.
 
While your window is suffering electrical issues, and you are into solving it's operation, it's best to go over the whole enchilada. Why? You're already in there...treat the entire mechanics of that assembly! You might go in that system only once in maybe 50 years, right?
 
Here's why! Last century, when the C2 and C3 were built, the factory loved using gobs of the white lithium lubricant, on EVERYTHING mechanical.
While it did provide great lubrication for it's day, over time it became a magnet for everything dirty. That alone over the decades would gum up any and all systems.
 
So, while you door panels are torn apart, window removed, exposing all the inner workings...remove it all and give those parts a degreasing bath. You would be surprised how that will loosen things up. Upon reassembly, use 21st century lubrication to bring your C2/C3 into the future.
 
Both my C3's have been treated in such a way.
 
Might not be the end all, but it would not hurt either! Any improvement on the ease of operating those windows is an improvement. This is just one of them.
 
Thumbs Up





|UPDATED|8/7/2018 6:05:37 AM (AZT)|/UPDATED|


____________________________________
 Reply Reply  Quote Reply w/Quote
8/8/18 12:18pm - Reply: 'Re: power windows have me stumped'
nosal1 Gold Member
Gold Member
- Send Private Message


Dunedin, FL - USA

Vette(s):
1980 Corvette Torch Red with Gold metallic 370HP/350 CU.IN.Turbo 350 w/shift kit.Originally CA.Car with 305 CU.IN.

Joined: 3/21/2006
Posts: 249

Years ago I had the same problem and found the switch was not working.I bought a new switch and proceeded to replace switch.When I got to the switch and took it out of the console.I found a sticker from an apple I had eaten and the sticker somehow got between switch and electrical plug..Switch I took out and replaced is still with me and in working order????? Good Luck...

Sal C                           nosal


____________________________________

(click to see a larger version)


 Reply Reply  Quote Reply w/Quote
 New Topic New Topic Post Reply Reply New Poll New Poll Search     Search Page [1]  
 Forums -> C3 Electrical
(Moderator: Adam Wartell, Norsky, Adams' Apple)
 

 
Official C3 Vette Registry Community:
Home | Forums | Email | Who's Online | Clubs | Events | Member Stats

Other Official C3 Vette Registry Areas:
Members | Research | Shop | My Account | About C3VR
 

Corvette is a registered trademark of the General Motors Corporation(GM) & Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise noted) and does not claim or imply that Chevrolet or GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated with, sponsored or supported by GM.  Copyright/trademark/sales mark infringements are not intended, or implied and are in fact used to support GM, Chevrolet and Corvette

Official C3 Vette Registry content is Copyright 2001-2018, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS

Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 30