Electrical issue on 79 Corvette
Thread Starter
Instructor
Joined: Feb 2011
Posts: 174
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Electrical issue on 79 Corvette
My lights went out on my speedometer and tach as well as all my guages
It happened when I was replacing my dash, my bro broke the light switch I replaced the switch with a junked one from a 78.
The wiper now makes a weird cracking noise when it is first initiated and sometime or another (I can't remember exactly what I did) I saw my lights on my tach and speedo flicker then go out.
I tested the 7.5 fuse that goes to isnt lamp but couldn't get anything from either side of the fuse. I replaced it anyway, no dice.
Headlights and wiper work
It happened when I was replacing my dash, my bro broke the light switch I replaced the switch with a junked one from a 78.
The wiper now makes a weird cracking noise when it is first initiated and sometime or another (I can't remember exactly what I did) I saw my lights on my tach and speedo flicker then go out.
I tested the 7.5 fuse that goes to isnt lamp but couldn't get anything from either side of the fuse. I replaced it anyway, no dice.
Headlights and wiper work
Thread Starter
Instructor
Joined: Feb 2011
Posts: 174
Likes: 0
But how does it have anything to do with my guage lights?
Is it fixable? My head lights do work
And I actually just remembered, it is the original light switch. We got the dash from the junked vette, and we broke the one in that dash. So we used the original light switch but a different wiper switch
Is it fixable? My head lights do work
And I actually just remembered, it is the original light switch. We got the dash from the junked vette, and we broke the one in that dash. So we used the original light switch but a different wiper switch
Last edited by ashes0; Mar 22, 2011 at 04:31 PM.
Pro
Joined: Apr 2007
Posts: 528
Likes: 9
From: Grand Rapids Michigan
I also have the clicking sound when operating the wipers... and sometimes when not operating the wipers. Since I need to do the brake booster and heater core the whole darn thing is coming out and getting cleaned up and reassembled with new LED instruments lights.
Car probably won't get driven this summer.
Car probably won't get driven this summer.
Melting Slicks
Joined: Oct 2006
Posts: 2,417
Likes: 336
From: Texas
wiper clicking may be delay relay in console,
check the tail light fuse (20amp) it sends power to the light switch, which transfers power through the light switch rheostat to the 7.5a fuse and then to the dash lights.
http://www.corvetteforum.net/c3/tune.../index12.shtml
http://www.corvetteforum.net/c3/tune.../index23.shtml
check the tail light fuse (20amp) it sends power to the light switch, which transfers power through the light switch rheostat to the 7.5a fuse and then to the dash lights.
http://www.corvetteforum.net/c3/tune.../index12.shtml
http://www.corvetteforum.net/c3/tune.../index23.shtml
Team Owner
Joined: Jun 2000
Posts: 38,923
Likes: 1,482
From: Southbound
Cruise-In II Veteran
IP lights (speedo, tach, cluster) dim up and down with the headlight switch ****. If the rheostat fails (common) the IP lights will not dim up or down and often will not work at all. Have you turned the **** to see if you have IP lights.
Second possible cause of no IP lights is the IP fuse in the fuse panel.
Do you have a good dash harness ground on the driver's hinge post?
Second possible cause of no IP lights is the IP fuse in the fuse panel.
Do you have a good dash harness ground on the driver's hinge post?
