Electrical Help
Thread Starter
Instructor
Joined: May 2019
Posts: 103
Likes: 13
From: Near D.C.
Electrical Help
I just changed out the resistor on my fuel gauge because it wasnt reading correct. That solved the initial problem for about 24 hours. I then lost the power windows, gauges, and speedo/tach. I changed out the 10A fuse for the gauges and the gauges are back. I thought that would fix the PW as well, but it didnt. So I still dont have PW or speedo/tach. My next thought is to switch out he 5A fuse for INST LPS to fix the speedo/tach. What else could I be missing for the PW?
Safety Car
Joined: Dec 2012
Posts: 3,789
Likes: 1,694
From: Summerville SC
Your power windows should have more than a 10A fuse. Something like a 25-30 since they draw a lot of power. You probably should add some more info to your thread. kike year of car. Also, when was the last time everything worked properly and what was the last thing that happened BEFORE they stopped working. Also, these cars have grounding issues so it might be something as basic as a good ground. Try and have an organized approach to looking for the problem. Once you have that figured out it makes the job a lot less intimidating. Good luck.
Thread Starter
Instructor
Joined: May 2019
Posts: 103
Likes: 13
From: Near D.C.
Good catch, forgot to post the car. It's a '77. I guess the 30A circuit breaker could be the issue. I suspect ground also. The gauges look like they are still ground properly. I'm going to check the PW ground (if I can find it).
Le Mans Master
Joined: Jun 2019
Posts: 7,645
Likes: 2,464
From: Indiana
Safety Car
Joined: Oct 2007
Posts: 4,360
Likes: 1,724
From: Seattle Area Washington
The link provided is the complete 1977 Corvette Electrical Troubleshooting Manual. It shows both early and late built 1977.
If your only looking for the power windows drawing it is on page 27.
The problem with most line diagrams found online, most if not all are early 1977 drawings.
1977 Corvette Electrical Troubleshooting Manual Link: http://www.europeancorvette.com/html...l_diagrams.htm
If your only looking for the power windows drawing it is on page 27.
The problem with most line diagrams found online, most if not all are early 1977 drawings.
1977 Corvette Electrical Troubleshooting Manual Link: http://www.europeancorvette.com/html...l_diagrams.htm
Melting Slicks
Joined: Feb 2007
Posts: 2,707
Likes: 268
From: S.E. MI
St. Jude Donor '15
If you pulled out the main connector for the gauge panel check to make sure the contacts on the pcb didnt come loose and are shorting out. It is a common problem, you just have to super glue them back in place.
