1977 Continually Blowing Power Window Relay
Thread Starter
3rd Gear
Joined: Nov 2020
Posts: 3
Likes: 0
1977 Continually Blowing Power Window Relay
My husband owns a mint condition 1977 Corvette he inherited from his Dad. The car has less than 10K miles. From sitting for so long, it had some issues.
The A/C didn’t work
The power windows recently stopped working
3 of the headlights had blown out
Leaking transmission fluid
As a surprise gift for our 25th wedding anniversary, I took it to our mechanic to be repaired. I purchased all of the parts from Eckler’s. The mechanic has now had it for 1 month. Everything is perfect with the exception of something blowing either the circuit breaker or window relay. It started after the new window motors were put in.
Does anyone have any suggestions?? The windows go up and down a couple of times and then the relay blows. Initially, the circuit breaker blew, but now just not relay. Any help would be greatly appreciated. This certainly didn’t work out to be the surprise I wanted
The A/C didn’t work
The power windows recently stopped working
3 of the headlights had blown out
Leaking transmission fluid
As a surprise gift for our 25th wedding anniversary, I took it to our mechanic to be repaired. I purchased all of the parts from Eckler’s. The mechanic has now had it for 1 month. Everything is perfect with the exception of something blowing either the circuit breaker or window relay. It started after the new window motors were put in.
Does anyone have any suggestions?? The windows go up and down a couple of times and then the relay blows. Initially, the circuit breaker blew, but now just not relay. Any help would be greatly appreciated. This certainly didn’t work out to be the surprise I wanted
Race Director
Joined: May 2006
Posts: 18,734
Likes: 2,582
The relay has to be replaced after a few cycles of lowering and raising the windows?
Do both sides cause this to happen?
Have you considered exchanging the motors?
Does your mechanic have a wiring diagram?
Does your mechanic have the shop manual?
Do both sides cause this to happen?
Have you considered exchanging the motors?
Does your mechanic have a wiring diagram?
Does your mechanic have the shop manual?
Last edited by MelWff; Nov 6, 2020 at 08:23 PM.
Safety Car
Joined: Oct 2007
Posts: 4,380
Likes: 1,745
From: Seattle Area Washington
Here is a link for the complete 1977 Corvette Troubleshooting Manual.
This manual covers both early and late build 1977, there is a significant difference between them.
Click each page photo to enlarge and save to a folder for later use if you want, or just save the power window diagram page.
Complete Manual Link: http://www.europeancorvette.com/html...l_diagrams.htm
Power Window diagram page Link: http://www.europeancorvette.com/phot...77/Page027.jpg
This manual covers both early and late build 1977, there is a significant difference between them.
Click each page photo to enlarge and save to a folder for later use if you want, or just save the power window diagram page.
Complete Manual Link: http://www.europeancorvette.com/html...l_diagrams.htm
Power Window diagram page Link: http://www.europeancorvette.com/phot...77/Page027.jpg
Thread Starter
3rd Gear
Joined: Nov 2020
Posts: 3
Likes: 0
Reply
I’m not sure what he has as far as diagrams and manuals. Yes, they have quit working regardless of which side you are using.
Racer
Joined: Jul 2015
Posts: 396
Likes: 101
From: Lehigh Valley Pennsylvania
When he first put the new motors in, everything was fine. The next day, he said when he went to test them, the circuit breaker blew. He replaced it and it blew again. He then replaced the power window switches. The windows would work for a while and then according to him, the relay was overheating. He installed the replacement relay today and the exact same thing happened.
I’m not sure what he has as far as diagrams and manuals. Yes, they have quit working regardless of which side you are using.
I’m not sure what he has as far as diagrams and manuals. Yes, they have quit working regardless of which side you are using.
FWIW, I replaced the motors, regulators and wheels on my windows and the windows fly up and down. One motor/regulator came form Paragon and the other from Corvette Central. I cleaned all of the grease out of the tracks and regreased and adjusted everything.
C3. 427, 4-link, c7 z06
Joined: Sep 2019
Posts: 997
Likes: 206
From: Virginia
A lot of new motors require a harness extension due to the motor not having the same type of connection.
1. If your mechanic didn’t use this harness or connected wires wrong it could be the problem on the malfunctioning side.
2. if he did sloppy wiring it could have a short.
3. Unlikely but if the doors have been off the wiring through the jam might not have the protective boot and you could have a short.
4. Faulty motor?
1. If your mechanic didn’t use this harness or connected wires wrong it could be the problem on the malfunctioning side.
2. if he did sloppy wiring it could have a short.
3. Unlikely but if the doors have been off the wiring through the jam might not have the protective boot and you could have a short.
4. Faulty motor?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski