72' alarm system question
Thread Starter
Drifting
Joined: Aug 2003
Posts: 1,327
Likes: 16
From: Fl
72' alarm system question
Here is the situation:
I have a new/rebuilt horn installed (bench tested), new switch in the rear.
All door contact switches and the hood switch work fine - tested.
My alarm horn will sometimes go off - but seems weak and it seems to only happen if I keep turning the switch on/off making the relay click ....
If I leave the door open and turn the switch in the back I can hear
the points in the relay make a clicking noise.
All the grounds are good and clean.
Any idea what would make the horn work intermitently?
Bill
I have a new/rebuilt horn installed (bench tested), new switch in the rear.
All door contact switches and the hood switch work fine - tested.
My alarm horn will sometimes go off - but seems weak and it seems to only happen if I keep turning the switch on/off making the relay click ....
If I leave the door open and turn the switch in the back I can hear
the points in the relay make a clicking noise.
All the grounds are good and clean.
Any idea what would make the horn work intermitently?
Bill
Drifting
Joined: Aug 2000
Posts: 1,758
Likes: 4
From: Medford, Or
Measure the voltage at the horn. If it is low, look for a voltage drop somewhere in the harness. I suspect you have a door switch connectors that got bent during the install (leads intermittently touching each other), thus causing intermittent horn sound. BTW, in the mid '70s C3 also had a momentary switch located behind the alarm key switch on the fender. This was used to sound the alarm incase a thief tried to disable the alarm by prying off the switch from the fender. Many times when Corvettes are painted the switch on the fender isn't installed correctly, causing the alarm to always sound.
Hope this helps,
Dan
www.vetteworksonline.com
Hope this helps,
Dan
www.vetteworksonline.com
