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Is there much of a difference in the lock cylinder switch for the c3 alarms?

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Old Jan 29, 2018 | 03:23 AM
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Default Is there much of a difference in the lock cylinder switch for the c3 alarms?

For the life of me I can’t find an alarm key cylinder for 1972 because they’re all discontinued. I can however find this:
http://www.zip-corvette.com/68l-71-a...ch-w-keys.html would this work if I wanted to restore my Factory 1972 alarm system or would the lock cylinder for the 1972 be drastically different?
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Old Jan 29, 2018 | 06:01 PM
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Old Jan 29, 2018 | 07:13 PM
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Default Hi and Welcome!

The switch that you posted a link to tightens with a nut.
The discontinued switch was held on by a clip called 'lock cylinder retainer' in your link.
Both are the same off & on with a turn of the key.

If you still have the old switch it can sometimes be brought back to life by soaking it in two parts ammonia and one part peroxide.


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Old Jan 30, 2018 | 01:11 AM
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[QUOTE=Peterbuilt;1596479529]The switch that you posted a link to tightens with a nut.
The discontinued switch was held on by a clip called 'lock cylinder retainer' in your link.
Both are the same off & on with a turn of the key.

If you still have the old switch it can sometimes be brought back to life by soaking it in two parts ammonia and one part peroxide.


[/QUOTE
I have no lock at all. I’m not even sure I have the wiring.]
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Old Jan 30, 2018 | 01:31 AM
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Default If you want to get into it...

Here's a schematic.




Here's where the parts are:


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Old Feb 6, 2018 | 09:35 PM
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Originally Posted by Peterbuilt
The switch that you posted a link to tightens with a nut.
The discontinued switch was held on by a clip called 'lock cylinder retainer' in your link.
Both are the same off & on with a turn of the key.

If you still have the old switch it can sometimes be brought back to life by soaking it in two parts ammonia and one part peroxide.

Peterbuilt:

I sent you a PM on this also.

You mentioned soaking in 2 parts ammonia to 1 part peroxide. Can you specify what kind of ammonia to use? I know ammonia in its base form is a gas. But ammonia is used in various products, e.g., window cleaners, and other commercial cleaning products.

Also, is the peroxide you mention hydrogen peroxide?

Thanks for your help Peterbuilt! I really appreciate it.
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Old Feb 6, 2018 | 10:53 PM
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Hi rdupler2,
I'll respond here instead of by PM in case others have the same question.
Yes, liquid ammonia as found as a household cleaner and hydrogen peroxide.
You can find them at Walmart and other big stores.
Regards Pete.
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Old Feb 9, 2018 | 09:47 PM
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Originally Posted by Peterbuilt
Hi rdupler2,
I'll respond here instead of by PM in case others have the same question.
Yes, liquid ammonia as found as a household cleaner and hydrogen peroxide.
You can find them at Walmart and other big stores.
Regards Pete.
Peterbuilt:

Thanks for the reply! I found some ammonia solution at ACE hardware.

A couple more questions.

1) How long should I allow it to soak?
2) What do you use to clean out the ammonia/peroxide from the switch after soaking? Just in case it might have a detrimental affect if it is left in there? Or just set it aside and let it dry out?

Thanks again Peterbult!

Regards,
Roger
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Old Feb 9, 2018 | 10:50 PM
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Try soaking the lock for 10 to 15 minutes while turning the key every few minutes.
If you try this twice and have no luck the lock is DOA.

Spraying graphite or similar lock lube and evaporation will clean it out.
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Old Feb 14, 2018 | 08:20 PM
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Originally Posted by Peterbuilt
Try soaking the lock for 10 to 15 minutes while turning the key every few minutes.
If you try this twice and have no luck the lock is DOA.

Spraying graphite or similar lock lube and evaporation will clean it out.
Peterbuilt:

I owe you a steak dinner sometime Everything you suggested worked perfectly! I now have a working alarm switch/system in my Corvette. I am eternally grateful.

Regards,
Roger
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