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1/29/12 11:59pm - Original Message: 'factory alarm questions'
daveo76
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 830
Does the factory alarm ('76) use a separate horn or the pair of regular horns?  If separate, where is that bad boy located?  Also, there is a little switch that's supposed to be installed adjacent to the key switch inside the fender.  I believe that it serves as a tamper resistant mechanism such that if the key switch is messed with it will activate the alarm.  How do you install that switch?  Should the button be kept pressed by the "L" terminal on the key switch?  Or should it just be very close but not depressed?  

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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1/30/12 9:01am - Reply: 'Re: factory alarm questions'
Adams' Apple Lifetime Member
Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
The alarm horn is mounted at the rear of the car, driver side, on the rear side of the wheelwell. It's above the muffler.
The key switch should have a switch(anti-tamper) attached to a bracket, and the plunger for the switch does use the "L" leg of the switch to hold it down. The switch is the same one used on the headlight buckets for the "Headlamps" light in the console.
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Joel Adams
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1/31/12 2:26am - Reply: 'Re: factory alarm questions'
daveo76
Standard Member
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 830
Thanks, Joel.  I found the horn.  I'm in the process of testing other electrical items (e.g. washer fluid pump, regular horns, etc.).  I thought I'd do some testing on the alarm system and try to get it functional, but now it seems like that could be a lot of time and effort.  That little anti-tamper switch is broken - not enough threads to secure it.  I tested it and it looks like with the button pressed the switch is open which tells me that leaving it out and disconnected should be OK.  But even if I do that, there are a lot of other problematic parts like door and hood switches.  Probably why the previous owner just told me not to use it because it drains the battery.....  Might save this project for another day....

____________________________________

 

1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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1/31/12 7:11am - Reply: 'Re: factory alarm questions'
rraider1
Former Member
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Woodland, WA - USA

Vette(s):
1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Joined: 10/14/2003
Posts: 1152
I repaired mine on the 77 I have the electrical circuit for the 77
http://www.C3VR.com/member_uploads/4201_4300/4221/1977_Alarm_System_sr.jpg  and some pictures of the safty switch inside the door and a better digram if and when you need some more info PM me and I would be able to email you some things. I did it just so every thing on the car worked but it can be pain. I am not sure the circuit should be similar the sw was moved from the fender to the door.


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Bob R
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2/1/12 11:07am - Reply: 'Re: factory alarm questions'
daveo76
Standard Member
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Vancouver, WA - USA

Vette(s):
1976 Silver/Firethorn. L48, 4spd. Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.

Joined: 8/25/2005
Posts: 830
Thanks, Bob.  I just PM'd ya.  Don't go to a lot of trouble, but if you have some helpful stuff I'd like to see it.  Thanks.

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
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