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[SteveMJ]

I re-fitted the power sounder last night (the one with replaced batteries) apart from the ear-splitting noise when it was re-connected it all seems OK.  

Would people like me to post up some photographs?  It will have to be in a week or so as I'm away.

[Andy B]

I re-fitted the power sounder last night (the one with replaced batteries) apart from the ear-splitting noise when it was re-connected it all seems OK.  

Would people like me to post up some photographs?  It will have to be in a week or so as I'm away.

Yes please Steve.

[Merlindriver]

.....
I have an interest as my "alarm" is playing up - leaving the car for about 15 minutes and it starts to sound, but not every time  

Bonnet switch is the usually culprit. The bracket gets bent over and the switch barely makes contact with the closed bonnet, bonnet cools/warms and moves slightly nad your alarm goes off. Just disconnect it as a test. If all is quiet ..... it's your bonnet switch!  

It's not that because once it has sounded I can't turn it off.  It seems to sound for a while, stop and leave the hazards flashing and then sound again.  Disarming turns off the hazards but the sounder still goes off.  If I start the engine it sometimes stops but othervise it stops at random.  

[Andy B]

.....
It's not that because once it has sounded I can't turn it off.  It seems to sound for a while, stop and leave the hazards flashing and then sound again.  Disarming turns off the hazards but the sounder still goes off.  If I start the engine it sometimes stops but othervise it stops at random.  

Could be the batteries in the power sounder have leaked then. Disconnect power sounder (under driver's side of scuttle) and see what happens.  

[Merlindriver]

.....
It's not that because once it has sounded I can't turn it off.  It seems to sound for a while, stop and leave the hazards flashing and then sound again.  Disarming turns off the hazards but the sounder still goes off.  If I start the engine it sometimes stops but othervise it stops at random.  

Could be the batteries in the power sounder have leaked then. Disconnect power sounder (under driver's side of scuttle) and see what happens.  

I'll give it a go.  However, if I disconnect the battery won't the radio lose its code?  I have a code on a card that came with the car, but the manual doesn't tell me how to resttore it.  The radio is a CDC2013 with multi changer and satnav - the manual just says if it shows "Safe" contact a dealer!  [smiley=undecided.gif]

[RobG]

.....
It's not that because once it has sounded I can't turn it off.  It seems to sound for a while, stop and leave the hazards flashing and then sound again.  Disarming turns off the hazards but the sounder still goes off.  If I start the engine it sometimes stops but othervise it stops at random.  

Could be the batteries in the power sounder have leaked then. Disconnect power sounder (under driver's side of scuttle) and see what happens.  

I'll give it a go.  However, if I disconnect the battery won't the radio lose its code?  I have a code on a card that came with the car, but the manual doesn't tell me how to resttore it.  The radio is a CDC2013 with multi changer and satnav - the manual just says if it shows "Safe" contact a dealer!  [smiley=undecided.gif]

You only need to disconnect the power sounder, not the car battery
Here;http://www.omegaowners.com/forum/YaBB.pl?num=1220198611

[Merlindriver]

Brilliant - a job for tomorrow.  Looking forward to seeing the pics of how SteveMJ replaced the battery in the sounder.

[SteveMJ]

Here are the photos.

Note the batteries are similar to the original (slightly higher capacity) and the board footprint is very close to the original too - enough that they fit in the same holes.









I've a couple of extra sets of batteries here.  Fiddliest part is cutting and re-joining the case - not a very satisfactory 'weld' with a soldering iron.  It just about 'does'.

[Merlindriver]

Where did you source the batteries from?

[SteveMJ]

CPC

[Merlindriver]

CPC

Before I commit, is this the one (or rather 2) I need?

[SteveMJ]

That's what I bought and fitted - the incumbant cells have 4 terminals the replacements have 3.  However you can bend the terminals (by about a mm or so) to allow fitting.

I could replace the batteries on the board if anyone wants this done (I'm away from tonight for a while so cannot respond until next week).

Note, the photos I posted link to larger ones.

Steve

[Merlindriver]

That's what I bought and fitted - the incumbant cells have 4 terminals the replacements have 3.  However you can bend the terminals (by about a mm or so) to allow fitting.

I could replace the batteries on the board if anyone wants this done (I'm away from tonight for a while so cannot respond until next week).

Note, the photos I posted link to larger ones.

Steve

How come they have 4 or 3 terminals, I'd have thought a battery would just have 2 - a +ve and a -ve.

[SteveMJ]

2 electrical terminals; with extra termnal to solder, this is to spread the mechanical load and to avoid incorrect fitting in a suitably designed circuit board.

[Merlindriver]

2 electrical terminals; with extra termnal to solder, this is to spread the mechanical load and to avoid incorrect fitting in a suitably designed circuit board.

Gotcha - as it happens I took the sounder off today and the plug was quite damp. So have dried it off and reassembled so I'll see if that does the trick.  It seems odd that the RHS scuttle drain grommet thingy just empties into the void where the sounder and horn are.