Aftermarket alarms-quick question.

[bull996]

Are car alarm sirens earthed?

Got a car alarm issue, and was wondering if car alarm sirens are earthed?

Thanks

[muley]

If it's got one wire running to it - almost certainly yes. If it's got 2 or more wires running to it, then possibly

[Dr Doofenshmirtz]

Yes, normally.
The alarm output is usually positive +ve to the alarm siren. Hence the other side goes to earth/chassis ground.

[E30M3SE]

What is the actual issue?