'76 Alarm Problem
Thread Starter
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
'76 Alarm Problem
When the key has been turned to set the alarm (doors locked and hood closed), the alarm horn immediately sounds off. I can't seem to find much in the archives or anywhere else so any help would be appreciated.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Jud the 76 alarm is pretty much just like the 72 alarm,except for 1 more switch added to the key switch. The system operates by a switch grounding out and tripping the alarm.One of your switches is tripping or going to ground when its not supposed to most likely.
The first switch I look at on a 76 is the anti-tamper switch that protects the fender key switch,in the link below.
http://willcoxcorvette.com/product_i...ducts_id=24165
The above diagram is for a 72 and doesn't show the anti-tamper switch.
The first switch I look at on a 76 is the anti-tamper switch that protects the fender key switch,in the link below.
http://willcoxcorvette.com/product_i...ducts_id=24165
The above diagram is for a 72 and doesn't show the anti-tamper switch.
Thread Starter
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Haven't had a chance to diagnose the problem yet but I'm reading that when the alarm is triggered, not only does the horn blow but the lights flash on and off. Can someone confirm this on a '76. Obviously only the tail lights would be affected, I guess, as the head lights would be normally under their covers.
Drifting
Joined: Jul 2008
Posts: 1,873
Likes: 27
From: Sonora CA
I had the exact same problem a couple of weeks ago. Finally found out that the passenger side door switch was not being depressed far enough when the door was closed. There is a square rubber pad on the door that depresses the switch and this pad has a very deep indentation, probably from old age.
Anyone know where these pads can be purchased??
Steve
Anyone know where these pads can be purchased??
Steve
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Thread Starter
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
I had the exact same problem a couple of weeks ago. Finally found out that the passenger side door switch was not being depressed far enough when the door was closed. There is a square rubber pad on the door that depresses the switch and this pad has a very deep indentation, probably from old age.
Anyone know where these pads can be purchased??
Steve
Anyone know where these pads can be purchased??
Steve
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Jud , if your car "has" the anti-tamper you can just unplug it and it will be removed from the system,same with all the switches , unplugging them removes that path to ground.
Let us know what you find.
Let us know what you find.
Thread Starter
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Apparently the anti-tamper switch is the problem. When disconnecting the electrical plug from it, it basically split in half, totally fubar. With the switch disconnected, the alarm appears to operate normally. Thanks for all the help, especially Roger. Jud
Thread Starter
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
I installed a new anti-tamper electrical switch ($25 from Zip) and this solved the problem. Thank you gentlemen.
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7th Gear
Joined: Feb 2005
Posts: 7
Likes: 0
From: Tucson Arizona
some good info here...were physically is the "anti-theft warn sw"? I know where the key switch in the left fender, the relay, the flasher, the horn, and the hood switch...but clueless on the "anti-theft warn sw" that's in my 77 wiring diagram. Thanks
Cruising
Joined: Aug 2013
Posts: 14
Likes: 0
Hi gents , I have a 76 that I just bought, my horn was all rusted and did not work for the alarm so I replaced it. But my alarm system still doesn't work.? .. My hazards work fine my blinkers work fine, my regular horn word fine.. I can't seem to figure out what's wrong with it or how to get it to work, can anyone point me in the right direction ? And where to locate some of the fuses and relays for the alarm system ... ? Please ?
