New thread - old issue... power windows appear to have no power

Discussion in 'C3 Forum' started by Valley Vette, Jun 23, 2016.

  1. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Hi gang. The good news is that I finally got my '75 inspected and passed for antique plates here in Nova Scotia (required to replace leaking power steering components which I did last Friday) however both power windows have now gone mute. A couple of years ago, I had opened the orig window switches to clean them up as they were not working well. All was fine until both windows suddenly ceased to function. As both windows are affected, me thinks its related to primary power. So far I've confirmed that the IGN 10 amp fuse is fine and confirmed with a 12V tester that power is crossing the fuse when the key is turned. I attached the tester to the battery + and the tester shows current continuity to the brown & blue (up/down) window wires leading from the center window switches. I thought that this might actually activate the window but no such event took place. I attached the tester to ground and, with the key turned, I probed the red & pink 12V hot window switch wires in the center console area but there wasn't any indication of power flow. From under the radio they are bundled and run up behind the instrument panel... Not sure I want to pull the panel as a next step!

    I researched some of the previous posts but could not find what looked like another good path to follow... Any thoughts as to where I might investigate next?

    VV / Doug
     
  2. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Did some additional research and discovered that there is a power window regulator located behind the radio on the center console. I'm thinking that might be the best place to explore next...
     
  3. nascar03

    nascar03 High RPM Poster

    Joined:
    Jan 27, 2009
    Messages:
    2,174
    Featured Threads:
    11
    Likes Received:
    902
    Location:
    Township of Langley, BC
    Car:
    1975 coupe/2003 vert
    Map
    Hi Doug...
    Good to have you back buddy!
    I wish I could help you with your windows but I have then crank kind!!
    I do have a set of GM shop manuals and an assembly manual if you need something scanned!
    Congrats on the antique certification.

    Take care
    Graham
     
  4. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Hi Graham, thanks for the kind offer however I have both those pubs and just put them back on the shelf. I'm thinking that the culprit is probably the regulator - we'll see.

    We drove an Astro Van for almost 15 years; it had crank windows and you know something, I never had a problem with the windows once... There's certainly something to be said for keeping it simple!

    It will be good to put some miles on the Vette again now that summer has arrived! More to follow as time permits.

    Regards,

    VV
     
  5. Riley P

    Riley P
    Moderator
    Staff Member

    Joined:
    Jan 11, 2009
    Messages:
    10,141
    Featured Threads:
    11
    Likes Received:
    698
    Location:
    Saska-ba-toon!
    Car:
    2000 Z51
    I still have an issue with the passenger side window in my truck, however, I found it was the blue wire with a white stripe that has a break in it somewhere (I'm guessing in the hinge area of the drivers door). Anyway, if one stops working, it makes it much easier to diagnose than if both go. I thought your trick of bypassing the switch would work. It sounds like you did a good diagnosis so I'm looking forward to hearing what you find out.
     
  6. wildone909

    wildone909 Member

    Joined:
    Aug 13, 2010
    Messages:
    86
    Likes Received:
    5
    Location:
    Port McNeill B.C
    Car:
    1980 , Red ,T.top
    Don't know if your car has the same switches as mine but on mine I believe the power wire runs through both switches in series. So when one switch went on mine both windows quit. I repaired the switches an plugins quite a few times till I finally bought new . My yearly problem is gone now:canada:
     
  7. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Thanks for the input. I'll have a chance to investigate further early next week.

    VV
     
  8. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Well how time flies! So a year later I finally rolled up my sleeves, gathered the tools and preparrd myself to take the center console apart. I confirmed both a good fuse and power at the box but no power at the switches. Thus the power regulator became the prime suspect. Took more dash apart and found the regulator. Confirmed a good ground and then, low and behold, I discover that the wires going to the switches had been pinched between the radio and other gear (no doubt happened when took the dask apart to swap in a new heater core a couple of years ago) and they eventually worked their way off the end of the plug! And when I plugged it back together, voila, both windows worked again! So now you know the rest of the story...

    :) VV
     
    Black 03 Z06 likes this.
  9. nascar03

    nascar03 High RPM Poster

    Joined:
    Jan 27, 2009
    Messages:
    2,174
    Featured Threads:
    11
    Likes Received:
    902
    Location:
    Township of Langley, BC
    Car:
    1975 coupe/2003 vert
    Map
    Doug (VV)..
    Happy Days!!
    I'm glad you found the issue. That is good sleuthing my friend.

    And thanx for the update..that may help someone else down the road.

    Graham
     
  10. Valley Vette

    Valley Vette Active Member

    Joined:
    Sep 12, 2011
    Messages:
    198
    Featured Threads:
    6
    Likes Received:
    58
    Location:
    Somerset, Kings County, Nova Scotia, Canada
    Car:
    1975 L82 Coupe
    Look ma, no windows! 20170611_151832_Richtone(HDR).jpg
     
    MikeysZ06 and nascar03 like this.
  11. nascar03

    nascar03 High RPM Poster

    Joined:
    Jan 27, 2009
    Messages:
    2,174
    Featured Threads:
    11
    Likes Received:
    902
    Location:
    Township of Langley, BC
    Car:
    1975 coupe/2003 vert
    Map
    Looking wonderful.

    Graham
     
  12. Rruuff Day

    Rruuff Day
    Moderator
    Staff Member

    Joined:
    Aug 30, 2014
    Messages:
    3,089
    Featured Threads:
    10
    Likes Received:
    1,887
    Location:
    Pine Lake, Alberta
    Car:
    2015 C7 3LT ZF1
    Map
    Woohoooo....and just in time Doug... I hear it's a smoking hot 32 or so lately......
     
  13. Black 03 Z06

    Black 03 Z06 High RPM Poster

    Joined:
    Oct 30, 2013
    Messages:
    3,842
    Featured Threads:
    29
    Likes Received:
    1,675
    Location:
    Haliburton, Ontario
    Car:
    2003 Z06
    Who said there are no happy endings? Great that you found the problem, wiring can be such a nasty issue.

    Well done.
     
Draft saved Draft deleted
Loading...
Similar Threads - thread issue power
  1. Nik
    Replies:
    14
    Views:
    223
  2. Nik
    Replies:
    0
    Views:
    169
  3. SN-III
    Replies:
    9
    Views:
    176
  4. caddyboy
    Replies:
    0
    Views:
    72
  5. SN-III
    Replies:
    50
    Views:
    2,384

Share This Page

Loading...