Siren not activating
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=81057
Printed Date: May 15, 2025 at 2:05 AM
Topic: Siren not activating
Posted By: rcpnt
Subject: Siren not activating
Date Posted: August 01, 2006 at 12:27 PM
Hello, I have an magicar 440, I know not the best, I installed it and the siren works intermitenly. I bought a new siren, but the same thing happens. I can get it to work for a few minutes, but it will stop. The rest of the sytem is working fine. I have it powered straight to the battery. When the siren does work, it seems to be low volume. Can anyone help? Thanks in advance
Replies:
Posted By: swamprat323
Date Posted: August 01, 2006 at 1:41 PM
re do the ground wire on alarm.
Posted By: rcpnt
Date Posted: August 01, 2006 at 2:16 PM
Thanks, but still nor consistant. It will go in and out. I ran the ground strait to battery.
Posted By: captainzab
Date Posted: August 01, 2006 at 2:34 PM
ground should usually be close to the siren and not a really long wire. Clean the grounding surface and make the connection of the ground near the siren.
Posted By: swamprat323
Date Posted: August 01, 2006 at 3:40 PM
the ground on the ALARM
Posted By: captainzab
Date Posted: August 01, 2006 at 3:57 PM
swamprat323 wrote:
the ground on the ALARM
Check that first, then the siren. Lol
Posted By: rcpnt
Date Posted: August 01, 2006 at 4:50 PM
The siren is two wires, one for power, the other connects to the main alarm. Should I shorten the ground to the main Alarm?
Posted By: supersix4
Date Posted: August 01, 2006 at 4:56 PM
Which ground wire did you run direct to the battery? Siren? Alarm? Both? Ground the ALARM to the Vehicle Chassis, close to the alarm's control module. The alarms siren output is Positive 12V, correct? If so, ground the Siren CLOSE to the Siren itself. Clean & Tight, baby ... Clean & Tight. If that still doesn't get it fixed, set the alarm off & measure the output voltage of the Siren Wire. Check with the manufacturer to see what the output voltage SHOULD be (+12V?). My bet, though - like the others here - is a poor ground. -------------
Posted By: rcpnt
Date Posted: August 01, 2006 at 5:18 PM
The siren does not have a ground wire, One is the 12v wire, the other connects to the alarm. I guess I'm confused on the ground thing. The second siren I bought is the same way. What am I doing wrong????
Posted By: swamprat323
Date Posted: August 01, 2006 at 5:57 PM
most aalrms has a postive output form alarm fro the siren you may have a negtive system.
take siren put both leads to the battery postive to postive etc does the siren sound loud, if so it is the alarm. there is a ground wire form alarm were is that connect to and how .
Posted By: supersix4
Date Posted: August 01, 2006 at 6:06 PM
OK - so the Alarm has a NEG(-) Out to trigger the siren ... that's normal. Try this ... test the SIREN by just touching its wires to the cars battery ... the thing should scream, since the siren is new, right? If it doesn't, bad siren. If the siren screams, gotta go back to testing the Alarm & the Install. Since the siren needs +12V & a Ground to operate, lets test those wires out by the Siren. First, is the wire that's SUPPOSED to be +12V REALLY +12V?? Test it with a DMM. If not, Correct & Test. If it IS +12V, time to test the Alarm's (-) Siren Output - again, with a DMM. If the ground is poor, check the ALARMS GROUND AGAIN! Correct & Test. Virtually all weak-sounding Sirens trace back to 2 things: 1) Poor Ground someplace. 2) Water in the Siren. !!! -------------
Posted By: rcpnt
Date Posted: August 04, 2006 at 7:56 PM
Ok, Here is the new proble. I did volt test on wire comiung from brain to siren. It is constant hot. When alarm is activated is goes cold. The other wires seem to be fine. Also the wire tests at 11.9 volts, not quite 12. Any sugesstions? You guys are really a big help, Thanks
|