When it comes to load-induced battery failures, it is important to remember this: 1) Alternators are intended to sustain loads. Within a year real sirens began to mysteriously reappear on the rigs. I asked, Truthfully now, have you noticed any difference?â€ He sheepishly grinned and said â€œNo, not reallyâ€. When queried, the shop foreman (a good friend) told me that his department had decided to remove their real sirens to reduce battery failures. While I advocate using six-pack battery arrangements and large alternators, I cannot condone misleading people about imaginary electrical burdens.Ī few years ago, while touring the repair facility of a large fire department on the southern coast of California, I noticed a lot of holes on apparatus where real sirens had obviously once been mounted. The continuous siren load myth is often invoked by people trying to justify the use of large alternators and/or battery arrangements. Every 50 watt halogen lamp you put on your vehicle adds about 4.2 amps of load while lighted. The real battery killer is the operator who leaves his vehicle idling for extended periods of time while lit-up like the Las Vegas Strip. That lower rate is misleading It has been estimated that six to eight electronic sirens would be needed to do the work of one real siren. Electronic sirens draw current continuously while activated, albeit at a lower rate. Like the arguments used against electric driveline retarders, this claim is based on the gristle-brained notion that simply bolting a real siren on your rig will automatically add a continuous 100 amp load to your electrical system, killing the batteries and wreaking havoc with sensitive electronics and communications equipment.įACT: Real sirens only draw current during wind-up and full wail. I found an article I had seen a while back, but had to do a search for it.Įlectro-Mechanical sirens use too much current. I did hook it up to a battery charger and confirms it does work, though it sounded kinda ill on the battery charger.

But I'd still like to learn a bit more about it, so any history on this siren you guys know of? Anything I should watch out for, such as defects or parts the wear easily? Thanks in advance.Īfter the first round of cleaning and polishing.lot of work to do still. I'm looking forward to getting this mounted to our ladder, once I'm done polishing it of course.

I was surprised when I watched the video that this Siren sounds almost identical to a Q siren. When I googled it I found very little info, and one Youtube video. I'm suppose to be polishing the old beast up so we can hopefully mount it to our new Ladder truck. I ask this because I have been handed one by my Captain. Somebody on some random internet forum I found called it 'Sireno's answer to the Q siren' And I've honestly never seen one before. Okay, what do you folks know about the siren in the title? All I've learned so far is its name, the Sireno Model 40010.

Emergency 4 la mod siren replacement