Car Alarm Siren...

[mazgtr]

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Edited June 8, 2006 by mazgtr

[fr0st]

If you cut the wires and measure there voltage (using the chassis as the ground) when the alarm is inactive and when its set off it should give you an idea how to hook up a 2 wire siren. One wire is always going to be a ground, the only other you need is one that goes to 12v when the alarm is suppose to be going off. The ground wire can be measured using an ohm meter directly to the chassis.

If its a 4 wire then it might be a battery backup one perhaps?

[mazgtr]

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Edited June 8, 2006 by mazgtr

[fr0st]

Well thats a bitch

If the red wire has a constant 12v then the siren may be negatively switched. So instead of having it constantly connected to the ground and switching the 12v on and off it could have a constant 12v and switch the ground.

Have you got a multimeter?

If so I'd measure the resistance of the green wire to the chassis. If you find that the resistance is high when the alarm is not sounding and low when is it, connect the red to the positive on the siren and the green to the negative on the siren.

Something has to change to tell the siren when to turn on... you just gotta find what

Good luck

[Space Goat]

hiya

watever you do dont use your horn as a siren as some of em do... if someone wants to pinch your car they lean under your car cut the horn wire and they can work silently without anyone knowing

Edited May 30, 2006 by Space Goat

[Chris Rogers]

pm me a pic of it and I'll pin it out for you.

[mazgtr]

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Edited June 8, 2006 by mazgtr

[Chris Rogers]

ok thats enough info. its a battery item. wire it:

red- +12

nlk - gnd

org (or wire it connects to) - trigger.

any idea on the make of the alarm. org usually indicates a cyclops unit.

[mazgtr]

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Edited June 8, 2006 by mazgtr

[fr0st]

Can you perhaps break apart your broken siren and post pics?

You can look for things like common wire (12v and grounds), wires connected to relay's or betteries etc. to give you can idea. Jaycar also sell a battery backup car siren which from the pic on there site looks like a 4 wire.

Did you try connecting the red wire on the siren to the red wire from the alarm and then trying the black siren wire on the other wires?

If that doesn't give you results I'm stumped

[mazgtr]

Ill stuff around with it tommorrow for another 30min, then ill get real mad, drink a beer, and head down to Jaycar with the old siren to find the closest replacement they have...

[mazgtr]

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Edited June 8, 2006 by mazgtr

[Chris Rogers]

red- +12

blk - gnd

blu - +ve trigger

I think yours is a neg trigger siren though.

can you show me a pic of the remote.

[mazgtr]

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Edited June 8, 2006 by mazgtr

[Chris Rogers]

so its sorted?

cool.

[mazgtr]

Yep. Cheers.