Question about Cars & Trucks

2 Answers

Is the a 12v power adaptor for the Yale easy fit siren EF-BX unit that can be fitted to the siren instead of the batteries ???

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer got voted for 20 times.

  • Expert
  • 135 Answers

Because your system is designed to operate off of batteries only, coming up with an external power supply to work around the original design becomes an issue. In order to do what you want to do you would have to have a rechargeable battery maintained by an appropriate charger that would run the system from the charger/supply, charge the backup battery and switchover to the battery in the event of a power failure. These do exist and one manufacturer is Altronix but there are several, you just have to visit a DIY alarm website and get recommendations bearing in mind the battery voltage your system is designed for and the amp hour rating necessary to keep the system running the duration of the power outage and beyond. Keep in mind the reason for your alarm system is security and compromising that with homemade non-UL retrofits might not be the way to go, your choice.

Posted on Dec 06, 2014

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 9,639 Answers

Make sure the power adapter has sufficient capacity to provide the current the siren needs. Some adapters only supply enough current to charge the internal battery but not operate the siren by itself.. A power adapter with enough current can be fitted to the siren.

Posted on Dec 06, 2014


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

When I attempt to connect ground on siren, why does it go off constantly and has 12v power at all times on the hot wire?

Hi Anthony:
If you follow the power flow, it has to start at the battery, probably go to a fuse, then to a switch, then to the siren, and the siren should be grounded to complete the circuit.
It may be that your siren does not have a grounded mount, in which case there will be a ground wire that has to be connected.
If the siren is activated when the ground wire is connected, the switch is closed or is not functioning correctly.
A bit of testing with a voltmeter and you'll tyrack it down.

Feb 15, 2016 | Cars & Trucks

1 Answer

Where is immobilizer located for saab 9-5 wagon 2000

The TWICE control unit is under the L Hand front seat/carpet but if a new one is to be fitted it has to be reprogrammed using Tech 2 equipment (Dealer) and all transponders,locks and keys at the same time.(car breakers are a good source)If it is the siren it is under the front of the L-Hand Front wheel arch, reachable by undoing the front edge of the liner.This unit usually prompts a message on the panel above the heater controls.Fault requires siren unit stripping and 2 rechargeable batteries and 3 capacitors replacing.

Nov 29, 2015 | Saab Cars & Trucks

1 Answer

How should I connect blue LEDs?

You may have to devise a way of applying 9 volts instead of 12.

Oct 24, 2015 | Cars & Trucks

1 Answer

I have a Yale Easy Fit Standard Alarm (EF-BX) Sometimes when I enter my house and enter my code in the keypad, the siren doesn't bleep twice to turn it off, I re-enter the code and sometimes this works and...

If you are sure you are pressing the buttons firmly.....does it register on the keypad? If so then could be faulty....return it to manufacturer, they will test it before replacing!

Jan 31, 2015 | Cars & Trucks

1 Answer

Can you put a bigger batterie in this fat and furious car

IF it is the toy that you are refering to then any size battery that is the same voltage if it will fit in will be ok. So if it is a 12 volt 2amp/hour and you can fit a 12v 4amp/hour in the space that will be ok ( as an example). Ni-cad batteries last longer. check the battery shops as there may be a ups battery that will fit, a battery drill pack that may fit. Terminals are easy to adapt for the job. REMEMBER it must be the same voltage or the motor will disappear in a cloud of smoke

Dec 10, 2013 | Cars & Trucks

1 Answer

Have 2010 Silverado. battery goes dead randomly. had batt. alt and voltage regulator checked and all is good.

With a multimeter, check for parasitic loss. YOu can google how to do that and it will reveal any power losses when the vehicle is at rest.
Simply a guess here, but I see the year of your vehicle and that might coincide with the failure of any alarm system backup battery, often fitted inside any alarm siren. If you do indeed have such a thing fitted to your vehicle, and if it hasn't been changed in a few years, then try disconnecting it. What often happens is the backup battery in the siren reaches the end of it's life and can no longer store electricity. It begins to draw more current from the starting battery to top itself off, but it can't top itself off any longer, so it continues until the vehicle's starter battery is drained.

Anyway, that's just a guess. Do a parasitic drain test. You should be looking at no more than 0.03 amps. If much higher than this, then pull any alarm sirens off, then recheck. Then pull the stereo fuse and recheck. Keep pulling fuses until you find the one which brings the voltage down to that figure, then you've found your culprit.

Sep 22, 2013 | 2004 Chevrolet Silverado

1 Answer

Alarm goes off even after unlocking with remote

If the alarm has a siren with a backup battery, then check the condition of the siren battery. Is it drawing a large charge (drop in amps from the battery. Run a parasitic drain test). If so, then the siren could be at fault.

Is the alarm fitted with a sonic motion detector? Looks like two tiny speakers in a unit fitted in the centre of the dash. If so, this unit could be faulty.

Many after market alarm systems by the way, tend to only last for a few short years before failing. Is this an aftermarket product or factory?

Nov 03, 2012 | 2005 Jeep Grand Cherokee

1 Answer

Fitting a new car stereo to the old wiring

hmm, this is an old post, do u still need help??
If u do lemme know and i'll give u a few tricks u can use.

Sep 28, 2008 | 1993 Volkswagen Fox

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

77 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides