C3 General General C3 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

What's this?

Thread Tools
 
Search this Thread
 
Old Oct 3, 2018 | 11:07 PM
  #1  
jr73's Avatar
jr73
Thread Starter
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,748
Likes: 268
From: Central Wisconsin
Default What's this?

Do I need it?
What does it do?
Not doing an original resto on this 73
Reply
Old Oct 3, 2018 | 11:15 PM
  #2  
general ike's Avatar
general ike
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2017
Posts: 2,377
Likes: 838
From: New York
2017 C3 of the Year Finalist
St. Jude Donor '20- '21
Default

Alarm? Not sure it is a GM component, it may be an aftermarket. Ike
Reply
Old Oct 3, 2018 | 11:35 PM
  #3  
CA-Legal-Vette's Avatar
CA-Legal-Vette
Race Director
20 Year Member
All Eyes On Me
Loved
Community Favorite
 
Joined: Jul 2004
Posts: 12,684
Likes: 329
From: Scottsdale Arizona
Default

I have a 73 as well and don’t have one there. If it’s running, guess you don’t need it.
Reply
Old Oct 4, 2018 | 06:36 AM
  #4  
Easy Mike's Avatar
Easy Mike
Team Owner
Supporting Lifetime
20 Year Member
 
Joined: Jun 2000
Posts: 38,923
Likes: 1,481
From: Southbound
Cruise-In II Veteran
Default

Can't say what it is, but it's not stock.
Reply
Old Oct 4, 2018 | 07:34 AM
  #5  
derekderek's Avatar
derekderek
Race Director
 
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
Default

From that shot, it looks like it could be an alarm siren or maybe some Oddball old electric fuel pump. Although I don't see any hose inlets on top. Take it off turn it upside down see what it looks like. Then take it down to the river and Float test it.
Reply
Old Oct 4, 2018 | 09:07 AM
  #6  
Richard454's Avatar
Richard454
Le Mans Master
20 Year Member
Active Streak: 30 Days
Top Answer: 1
Top Answer: 3
 
Joined: May 2003
Posts: 8,874
Likes: 3,551
From: Fernandina Beach FL
2023 Restomod of the Year finalist
2020 C3 of the Year Winner - Modified
Default

Looks like a part of an old aftermarket cruise control-

Richard
Reply
Old Oct 5, 2018 | 11:26 PM
  #7  
jr73's Avatar
jr73
Thread Starter
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,748
Likes: 268
From: Central Wisconsin
Default

well that's strange, this thing looks as old as the car. I'm pretty sure I'm taking it off and take my chances.
For the record the car was in pieces when I got it so I'm pretty much making this up as I go along.
Reply
Old Oct 6, 2018 | 09:13 AM
  #8  
general ike's Avatar
general ike
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2017
Posts: 2,377
Likes: 838
From: New York
2017 C3 of the Year Finalist
St. Jude Donor '20- '21
Default

See if the section below spins then it’s a alarm. Of course it could be frozen up. Put power to the wires and see what it does. Sure looks like what I remember aftermarket alarm sirens looked like. But there are many years that have gone by so........ stand back when you power it up!! 😂😂
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

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

 Joe Kucinski
story-7

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

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Oct 6, 2018 | 11:40 AM
  #9  
jr73's Avatar
jr73
Thread Starter
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,748
Likes: 268
From: Central Wisconsin
Default

Originally Posted by general ike
See if the section below spins then it’s a alarm. Of course it could be frozen up. Put power to the wires and see what it does. Sure looks like what I remember aftermarket alarm sirens looked like. But there are many years that have gone by so........ stand back when you power it up!! 😂😂
thanks, I'll also put on some safety glasses, just to be safe
Reply
Old Oct 7, 2018 | 06:17 PM
  #10  
The13Bats's Avatar
The13Bats
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
Default

I have an old motor driven siren that basically looks just like that
Reply
Old Oct 8, 2018 | 06:59 AM
  #11  
midigike's Avatar
midigike
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2011
Posts: 1,689
Likes: 174
From: Deerfield Illinois
2022 C3 of the Year Finalist - Modified
C3 of Year Finalist (appearance mods) 2019
Default

I have the same siren on my 68, this was an aftermarket, dealer installed alarm system. They normally put the key portion on the front drivers fender above the vents.
I have it hooked up to a switch under the dash and it cranks pretty loudly..sounds like an old fire truck siren.
Makes for a big hit at parades and such, bench test that baby with some 12v and be amazed...
Reply
Old Oct 8, 2018 | 08:30 PM
  #12  
jr73's Avatar
jr73
Thread Starter
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,748
Likes: 268
From: Central Wisconsin
Default



I put 12 volts to it and it just got the wires hot and did nothing. It was kind of locked up so I got it spinning again after I took the power away.
Reply
Old Oct 8, 2018 | 08:33 PM
  #13  
jr73's Avatar
jr73
Thread Starter
Drifting
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2013
Posts: 1,748
Likes: 268
From: Central Wisconsin
Default

If that's an alarm then what is this in the rear quarter?
Reply
Old Oct 8, 2018 | 08:51 PM
  #14  
general ike's Avatar
general ike
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Feb 2017
Posts: 2,377
Likes: 838
From: New York
2017 C3 of the Year Finalist
St. Jude Donor '20- '21
Default

That's the alarm GM installed when the car was new. from the factory. It does not look too great but it may be able to be salvaged and or rebuilt. Clean it up and give it some power and slowly play with the small screw on top and you may get it to come back to life. I did so with mine. You will also find other alarm components in the jack compartment.

The other alarm is done for and is a rusty mess. Not worth saving since it is not original. The GM alarm was cool but absolutely useless from a security point of view. I assume someone decided to put a more sophisticated alarm system on the car. Ike

Last edited by general ike; Oct 8, 2018 at 08:53 PM.
Reply
Old Oct 11, 2018 | 02:43 PM
  #15  
Raphiki's Avatar
Raphiki
Melting Slicks
Supporting Lifetime Gold
St. Jude 10 Year Donor
Conversation Starter
Liked
Loved
 
Joined: Jun 2005
Posts: 2,239
Likes: 74
From: Palatine, Peoples Republic of Illinois
St. Jude Donor '09-'10-'11-12-'13-'14-'15-'16-'17-‘18
NCM Sinkhole Donor
Default

That rusty piece of junk on your firewall is an aftermarket siren. The fins on the bottow force air through the sides to make the sound.
Reply

Get notified of new replies

To What's this?





All times are GMT -4. The time now is 09:11 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE