Central locking won't work with clicker

Post Sun Jul 13, 2014 10:48 am

Very simple; a moving coil loudspeaker has an impedance (similar to resistance) of the coil - in your case, it appears to be an 8 ohm speaker. If you were to use a multimeter to measure its resistance, it should read approx. 8 ohms.

I suggest you do this, or use a 1.5V battery connected across it to test it makes a clicking sound. If not, then the speaker is dead and needs to be replaced.

Connecting a '12V siren' from E-bay in place of it is unlikely to work at all!

Post Tue Jul 15, 2014 11:33 pm

The speaker still works .
We tested using a 12V battery charger .
So the alarm seems to be no good no more , or the siren bit anyway

Post Tue Jul 15, 2014 11:35 pm

I hope you didn't connect the battery charger direct across the speaker?!

Post Tue Jul 15, 2014 11:38 pm

Yes did it twice with no faults?
Did it twice just to make sure I weren't hearing things.

Post Tue Jul 15, 2014 11:43 pm

I'm amazed it didn't blow the speaker coil the first time round! 12V into 8 ohms = 1.5 Amps of current, or 18 watts of power.

Typically, these small speakers are only rated at 0.25-0.5 Watts.

Post Tue Jul 15, 2014 11:44 pm

We are on about the alarm speaker right?
If so is there anyway we can use another alarm?
Can you nominate one.

Post Tue Jul 15, 2014 11:49 pm

Yes, I'm on about the 8 ohm loudspeaker in your alarm.

You could fit any other alarm that you want.

Post Wed Jul 16, 2014 12:38 am

But couldn't I just fit a alarm speaker with the wires that are there.?

Post Wed Jul 16, 2014 10:35 am

The problem there is that the circuit contains the oscillator for the alarm, that drives through the loudspeaker.

The 12V siren you mentioned earlier has the oscillator circuit built in, and the existing oscillator circuit probably wouldn't be capable of driving the 12V siren.

I suggest you test the loudspeaker again with a 1.5V battery this time, and if (by some miracle!) it's still working, try to get the circuit board operational again.

Is there a wire missing from the top right of the board?

Post Thu Jul 17, 2014 12:02 am

That is the 3 points the battery connect to.

Post Thu Jul 17, 2014 9:48 am

BROOMY, I have a nice cheese grater, I'll do you a deal

Post Thu Jul 17, 2014 11:47 am

Would this happen to be the one you use on your private parts, by any chance?

Post Thu Jul 17, 2014 11:54 am

Speedtouch wrote:Would this happen to be the one you use on your private parts, by any chance?

That's the one. I bought it at a boot sale in Cantebury. It took ages to wash off the smell of 'trunnion ' oil

Post Thu Jul 17, 2014 12:24 pm

Hehe, as a previous Minor owner, you should surely know that the trunnions should be regularly lubed with a suitable grease, such as Castrol LM; oil is reserved for the lever arm dampers, carburettor dashpot and steering rack.

Post Thu Jul 17, 2014 12:59 pm

I guessed it was yours

BROOMY is definitely a spesh with sadomasochistic leanings . I reckon he's up for it, especially if I serve it with an old Clifford that I have 'fixed' with a club hammer

Post Thu Jul 17, 2014 1:54 pm

Would that be the 'Max' Clifford version?

Post Sun Jul 20, 2014 6:23 pm

I need a picture or a diagram of the alarm wiring.
Could it be possible that it actually need the battery to actually work and someone's lied to me?

Post Sun Jul 20, 2014 9:46 pm

It's possible that it may need the back-up battery to work, but I would expect it to do somehting if powered up by the car battery.

Did you test the speaker again with a 1.5V battery like I suggested?

Post Sun Jul 20, 2014 10:32 pm

No .
Will a regular AA do?
Would a wire across the terminals do?
Just till I know it works.

Post Sun Jul 20, 2014 10:35 pm

Yes, either an AA/AAA, or even a watch battery will suffice. Use a length of wire to connect to one terminal of the speaker, and touch the other battery terminal on the other speaker terminal - it should make a click sound.

Post Sun Jul 20, 2014 10:37 pm

Ok just need to find some wire now.
Also if it works what do I do then?

Post Sun Jul 20, 2014 10:59 pm

Pony, is that you ?

Post Sun Jul 20, 2014 11:00 pm

Is that to me or speed touch ?

Post Thu Jul 24, 2014 12:12 am

Yes it clicks.
Now what should I do?

Post Thu Jul 24, 2014 12:13 am

Hey who changed under my name to busy saving Clifford lol.

Post Thu Jul 24, 2014 10:43 am

Well, congratulations - at least the speaker is working.

If you have a soldering iron, I would go over the corroded solder joints, and re-do them.

Post Fri Jul 25, 2014 4:16 pm

Could do all them to find out I need the battery.
Also do you need 22 with 7 Because I only ordered 7
http://www.realoem.com/bmw/showparts.do ... g=41&fg=50

Post Fri Jul 25, 2014 4:24 pm

Sure. Why not get a battery then, and try it...

I would imagine you could re-use your existing circlip, if it's in reasonable condition.

Post Fri Jul 25, 2014 4:27 pm

There wasn't one on there?

Post Fri Jul 25, 2014 4:28 pm

Oh well, perhaps it fell off and is in the bottom of the door, or perhaps one isn't necessary...

Post Fri Jul 25, 2014 4:29 pm

How many positions has the boot lock key got?

Post Fri Jul 25, 2014 4:31 pm

2 right ?

Post Fri Jul 25, 2014 4:39 pm

I think so, yes.

Post Fri Jul 25, 2014 4:41 pm

Does your central locking on your boot lock at all times?
Mine seems to never work.
Just locks the rest up.

Post Fri Jul 25, 2014 5:35 pm

Mine works perfectly, all the time