C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

1970 Corvette Theft Alarm Lock remove/replace

Thread Tools
 
Search this Thread
 
Old Jan 23, 2022 | 10:58 PM
  #1  
fjules21's Avatar
fjules21
Thread Starter
Heel & Toe
 
Joined: Sep 2021
Posts: 20
Likes: 3
Default 1970 Corvette Theft Alarm Lock remove/replace

Hi,
I am considering trying to fix the alarm system. First step I need to do is remove and reinstall the alarm lock at the back of the car. Anyone have any experience remvoving and reinstalling this lock? It seems to be in a difficult area to access. Do I have a chance to pull this off?
Reply
Old Jan 24, 2022 | 06:44 AM
  #2  
forman's Avatar
forman
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Mar 2010
Posts: 2,268
Likes: 374
From: Randolph nj
Default

theres 2 wires on the back of the key switch jump them together and open the door to see if it works
Reply
Old Jan 24, 2022 | 02:00 PM
  #3  
Peterbuilt's Avatar
Peterbuilt
Le Mans Master
15 Year Member
 
Joined: Aug 2006
Posts: 7,423
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Default Does this help?

To remove the alarm switch first remove this alarm switch retainer.

https://willcoxcorvette.com/corvette...retainer-63-82

Make sure that the 'CLK LTR CTSY' fuse is good

Here's where all the parts are located.



Here's a basic schematic:


Reply
Old Jan 24, 2022 | 03:11 PM
  #4  
jeffstuarts's Avatar
jeffstuarts
Instructor
10 Year Member
All Eyes On Me
Top Answer: 1
 
Joined: Nov 2013
Posts: 128
Likes: 29
From: Bloomfield Township Michigan
Default

To get at the switch, lower the spare tire bucket and take the spare out. Then you need to lay inside the bucket and you can get to the switch. I don't remember5 if you have to take out the upper part of the bucket. Even easier if you totally remove the bucket but very often the front long bolts are rusted into the frame. If they are, don't put too much torque on them because you can break the nuts welded inside the frame loose and that's something you do not want to have happen. The switch is attached by a simple bezel nut which may or may not be rusted in.
Jeff
Reply
Old Jan 24, 2022 | 03:30 PM
  #5  
forman's Avatar
forman
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Mar 2010
Posts: 2,268
Likes: 374
From: Randolph nj
Default

So heres the reality of the car alarm I got mine working perfect on my 70 , had to replace the relay in the jack box ,replaced the horn under the car ,replaced the key switch ( if you can find the real brigs&stratton one home run) ,, then you have to check all the switches cause they will corrode in the door jams and under hood if you have them there,, all years are different I found that you can change the pins on the switches its time consuming ,, So now the Alarm works and heres the big BUT if the car alarm goes off for a extended period of time it will completely discharge your battery so now I just pulled the relay off the system and turned the alarm totally off ,, if you want theft control put a push button battery switch somewhere under the dash the car wont move
Did I tell you I got it working perfectly,, LOL you cant even make this up and if someone tells you anything else on here they must have a back up battery
Reply
Old Jan 24, 2022 | 06:41 PM
  #6  
fjules21's Avatar
fjules21
Thread Starter
Heel & Toe
 
Joined: Sep 2021
Posts: 20
Likes: 3
Default

Guys,
Thanks for the replies. You have given me all info needed to move forward. Forman has me rethinking if I should even bother!
Reply
Old Jan 24, 2022 | 07:22 PM
  #7  
forman's Avatar
forman
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Mar 2010
Posts: 2,268
Likes: 374
From: Randolph nj
Default

This is why I was telling you to jump the 2 wires together and see if it works first then you would just need the key switch and nothing more or you could end up spending 200 on parts and a bunch of time for a half *** alarm system that drains your battery .. don’t get me wrong if someone ask me if it works on my car it would only take me 15 seconds to hook the relay back up it’s only a plug
Reply
Old Jan 24, 2022 | 07:28 PM
  #8  
forman's Avatar
forman
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Mar 2010
Posts: 2,268
Likes: 374
From: Randolph nj
Default

You don’t even have to remove the wires from the switch just hook up banana clips and it should work
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Feb 1, 2022 | 09:18 PM
  #9  
fjules21's Avatar
fjules21
Thread Starter
Heel & Toe
 
Joined: Sep 2021
Posts: 20
Likes: 3
Default

Removed the flasher and gounded the connector and horn works. The flasher and relay are pretty crusty, will try to clean them up, might need to replace. The wires to the key switch are broke off so need to remove the key switch to see what is going on with that.
Reply
Old Feb 1, 2022 | 10:15 PM
  #10  
forman's Avatar
forman
Melting Slicks
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Mar 2010
Posts: 2,268
Likes: 374
From: Randolph nj
Default

Well that’s good 👍
Reply

Get notified of new replies

To 1970 Corvette Theft Alarm Lock remove/replace





All times are GMT -4. The time now is 06:48 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE