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The alarm may not be going off. Rather it may be a malfunction of the relay that is driving all the sirens and piezo. Next time it happens check for flashing parking lights. They will flash only when alarm is going off. Also ignition input to the alarm prevents this alarm from going off while driving. Panic from the remote can still be triggered. Got to play detective....
The siren has two wires: connect the red wire to a fused battery source. Connect the black wire to one side of a two wire toggle switch. Connect the other wire of the two wire toggle switch to a chassis ground. Now you can control the siren by applying the ground when toggling the switch.
Wire nuts are ok if the siren is indoors. Gel filled connectors are better if you are mounting the siren outside because they keep the connection from corroding. The resistor needs to go between the two wires you are hooking up. The color of the wires you will are are generally red and black. If your siren has a yellow wire, you can use it instead of the red to get constant siren instead of the "whoop, whoop, whoop" sound that sirens usually make. Putting the resistor at the siren will make sure that it is supervised. That means that if someone cuts the wire going to the siren, it will alert you at the panel. If you put the resistor at the panel, nothing will happen if the wire is cut.
turn ignition on and within 10sec push the valet switch once then push and hold again. the siren will chirp once then push the lock button on the transmitter and the siren should beep once then let go of the valet switch and turn ignition off and remote should function properly
An output wire is not connected, you'll need to connect the brown wire on the 12 pin harness to the siren, it will be pin number 10. Either that or your siren is bad.
this "could" be a bad ground, however, usually when these units lose ground, they activate the siren at a really low level, because they are trying to ground through the siren.
I would say to check where the antenna plugs into the main unit,(brain) but honestly, in 17 years of dealing with DEI alarms, 99.9% of these problems are due to the transmitter - it may blink the LED like it is supposed to, but that doesnt gaurantee it is sending a signal. I would recommend buying a new transmitter and programing it to the brain.
If you're connecting at the alarm module - you want the red wire from the siren to go to the brown wire on the alarm(the one that's in a plug with 12 or so other wires), not the red (red wire is the constant power input to the alarm).
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