I bench checked the alarm horn and it sounds fine. Installed on the car both door switches and the hood switch make the alarm sound but it is just a pulusing chirp not an alarm. I run a ground from the battery to the horn but it's still the same. What do I need to check to get it working for the regional this weekend.
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Lyle
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Re: 73 Alarm system
I'm not sure what you're looking for (pulsing chirp vs. alarm). The circuit is essentially the horn driven by a turn signal flasher to make the horn pulse on/off (just like a tail light blinking)... -
Re: 73 Alarm system
Well it sounds an alarm but it is very low like a pulsing chirp. I need it to be much louder to pass opps.Lyle
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Re: 73 Alarm system
Might be your flasher module is worn/tired and you're not getting crisp full amperage current switching...Comment
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Re: 73 Alarm system
I would suggest a new flasher, but it could be the relay is not allowing full voltage thru it to the horn. You can sometimes clean the relay contact "points" with fine emory cloth, and get a good contact.
I'd try a different flasher first, tho.
Joel Adams
1974 Coupe
1985 Coupe
"I know the voices aren't real...but sometimes they have some really kewl ideas...."
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Re: 73 Alarm system
Is the relay in the jack box right beside the flasher?Lyle
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Vice-Chairman (West), Michigan Chapter NCRS
71 "deer modified" coupe
72 5-Star Bowtie / Duntov coupe. https://www.flickr.com/photos/124695...57649252735124
2008 coupe
Available stickers: Engine suffix code, exhaust tips & mufflers, shocks, AIR diverter valve broadcast code.Comment
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Re: 73 Alarm system
Lyle,
Yes, the relay is held by a screw into a plate while the flasher is to the left of the relay (passenger side) and held by a clip.Comment
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Re: 73 Alarm system
Lyle, Sometimes The Horn Itself Requires To Much Amprage For The Flasher, Causing The Alarm Horn Not Pulse Properly. The Horn Must Sound Loud , If Not You've Found The Problem.New England chapter member, 63 Convert. 327/340- Chapter/Regional/national Top Flight, 72 coupe- chapter and regional Top Flight.Comment
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Re: 73 Alarm system
I think the horn is the problem. A horn that is loud when teasted on a battery won't make a sound when installed. I have had this happen many times on different cars. I got an E-mail that a $150. horn rebuild did not honk when installed but a $10. horn from the local auto parts store worked fine.Lyle
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Re: 73 Alarm system
The final result was the best I could get the system to work at home was the hood sounded the alarm and both doors made a weak chirp.
At the regional all three places sounded a great alarm. I guess hauling it down the rough road through Chicago fixed an alarm I couldn't fix at home with hours of trying. I did score a 97+ so I can try the PV next.Lyle
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