76 alarm
Thread Starter
Racer
Joined: Nov 2003
Posts: 353
Likes: 1
From: Sugar Land, TX
76 alarm
I read and have used Ken Snyder's great article on alarm system repair. However, I have one question that I do not think was answered in his article. When I had to repair fiberglass and re-rivet the back plate for the alarm button on the passenger side I find that there are two white wires. One goes to the switch the other to the back plate. Does anyone know where the white wire to the back plate goes? I assume the switch white wire is the one that goes to the alarm switch on the drivers side.
Also, if anyone has a wiring diagram for a 76 please direct me to it. It seems that I have found on 77 diagrams with the door switches grounded and not two wires white and blue going to the switch.
Also, if anyone has a wiring diagram for a 76 please direct me to it. It seems that I have found on 77 diagrams with the door switches grounded and not two wires white and blue going to the switch.
Racer
Joined: May 2014
Posts: 420
Likes: 6
From: Springfield Missouri
PM me your email address and I can send you some 76 wiring diagrams. However, I'd really suggest buying a set from Doc Rebuild; his diagrams actually show the connectors at the ends of the wiring so you can easily identify something you find unplugged. Cant link to him since he's not a supporting vendor but you can google him.
Racer
Joined: May 2014
Posts: 420
Likes: 6
From: Springfield Missouri
This thread is talking about a 75 alarm system, but as far as I know the 76 is identical. The diagram Wilcox posted at the bottom of page 1 does not show a 3rd wire.
This thread is from 2009 and shows a diagram for a 70, but the parts are mostly similar, if located differently. It shows the 3rd wire at the door ajar switches that you're talking about, but does not indicate what it connects to. Like my76ray, I'd say probably a ground.
Can anyone else out there help solve the mystery?
This thread is from 2009 and shows a diagram for a 70, but the parts are mostly similar, if located differently. It shows the 3rd wire at the door ajar switches that you're talking about, but does not indicate what it connects to. Like my76ray, I'd say probably a ground.
Can anyone else out there help solve the mystery?
Thread Starter
Racer
Joined: Nov 2003
Posts: 353
Likes: 1
From: Sugar Land, TX
Thanks for all of your comments. The problem is solved. As Ken Snyder's article stated, there is a wire that connects the two switch back plates. That is the third wire. I assumed that one of the switch wires, light blue and white, connected to the other back plate. When I took off the other inspection cover, where the body mounts are, I found that the wire had broken off the back plate. I used a jumper to determine if the broken wire was the culprit and it was. I now have to enlarge the hole where the wires go through so that I can remove the back plate. Connect the broken wire, and re-rivet the back plate.
Le Mans Master
Joined: Aug 2006
Posts: 7,431
Likes: 1,561
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
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
Thread Starter
Racer
Joined: Nov 2003
Posts: 353
Likes: 1
From: Sugar Land, TX
Additional information about the alarm system. The alarm horn is fused off of the instrument fuse. Also, the door ajar light will work even if the wire connecting the two switch back plates is open and the fuse is removed. Because the door ajar light was working I thought all wires were connected, wrong.
Racer
Joined: May 2014
Posts: 420
Likes: 6
From: Springfield Missouri
I read and have used Ken Snyder's great article on alarm system repair. However, I have one question that I do not think was answered in his article. When I had to repair fiberglass and re-rivet the back plate for the alarm button on the passenger side I find that there are two white wires. One goes to the switch the other to the back plate. Does anyone know where the white wire to the back plate goes? I assume the switch white wire is the one that goes to the alarm switch on the drivers side.
Now I feel bad: I should have looked at the AIM first thing when I got home instead of letting it drag out this long. Sorry original76.
