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[Omega3]

Hi all.
I'm going to fit a new battery tomorrow (2.2) I'm aware of the disconnect within 15 secs of switching off ignition, does it matter which terminal? And what's the procedure after reconnecting, for windows, locking e.t.c
Many thanks in advance.

[unlucky mark mv6]

Hi all.
I'm going to fit a new battery tomorrow (2.2) I'm aware of the disconnect within 15 secs of switching off ignition, does it matter which terminal? And what's the procedure after reconnecting, for windows, locking e.t.c
Many thanks in advance.

Disconnect negative,and reset the windows by lwering them then raising them again and hold the button down when it reaches the top for a couple of seconds IIRC.

[dbug]

Or connect a 12v power pack or another 12 v battery across the terminals, remove old battery, fit new and then disconnect power pack/spare battery.  No need to reset anything job done 

[Omega3]

Or connect a 12v power pack or another 12 v battery across the terminals, remove old battery, fit new and then disconnect power pack/spare battery.  No need to reset anything job done 

That's an interesting idea dbug, I'll give it a try.  I take it the powersounder will not be affected either.

[Entwood]

If you do this just be careful ...   the "positive" lead and the power pack connector MUST be kept clear of everything else .....  I've seen someone doing this and they managed to knock the "positive" as they lifted the dead battery out, it touched the body work and in a flurry of serious sparks welded itself to the bodywork, shortly followed by a horrible smell as the insulation on the powerpack cables started to melt. As there is no isolation switch the only way to stop the process was to wack the newly welded connection with a handy mallet and break it off. Hindsight (what a wonderful that is) suggested that disconnecting the "negative" may have worked better but at the time that was not thought of !!

JUST BE CAREFUL

[Omega3]

If you do this just be careful ...   the "positive" lead and the power pack connector MUST be kept clear of everything else .....  I've seen someone doing this and they managed to knock the "positive" as they lifted the dead battery out, it touched the body work and in a flurry of serious sparks welded itself to the bodywork, shortly followed by a horrible smell as the insulation on the powerpack cables started to melt. As there is no isolation switch the only way to stop the process was to wack the newly welded connection with a handy mallet and break it off. Hindsight (what a wonderful that is) suggested that disconnecting the "negative" may have worked better but at the time that was not thought of !!

JUST BE CAREFUL

OK so you've made my mind up. I'll reset the windows and enter the CD code.....

[dbug]

If you do this just be careful ...   the "positive" lead and the power pack connector MUST be kept clear of everything else .....  I've seen someone doing this and they managed to knock the "positive" as they lifted the dead battery out, it touched the body work and in a flurry of serious sparks welded itself to the bodywork, shortly followed by a horrible smell as the insulation on the powerpack cables started to melt. As there is no isolation switch the only way to stop the process was to wack the newly welded connection with a handy mallet and break it off. Hindsight (what a wonderful that is) suggested that disconnecting the "negative" may have worked better but at the time that was not thought of !!

JUST BE CAREFUL

OK so you've made my mind up. I'll reset the windows and enter the CD code.....

Done this many times on numerous vehicles - agree 100% - you have to be careful!!  Best if you get a helper to hold +ve as old battery lifted out and new inserted!!

[amba]

Why is the process ..switch off ignition and within 15 seconds disconnect battery ?
When ever I have removed battery I just remove  negative lead..then positive and cover both with a rag to stop hitting battery post when removing..then just refit in reverse way..then reset codes and windows.
Whats this 15 second thing about then ?

[Jimbob]

Why is the process ..switch off ignition and within 15 seconds disconnect battery ?
When ever I have removed battery I just remove  negative lead..then positive and cover both with a rag to stop hitting battery post when removing..then just refit in reverse way..then reset codes and windows.
Whats this 15 second thing about then ?

Meant to stop the alarm going off.

[amba]

Strange but mines has never sounded when I disconnecr battery as described...and I know alarm does work ! must be an in built saftey feature on mine.

[Entwood]

Your alarm might well be working .. but sounds like your "powersounder" isn't !!

Powersounder is designed ONLY to activate if the main battery power is lost whilst the system is armed .. it is there to prevent a scrote disconnecting the battery before stealing your car ....

[mathewst]

But if the alarm isn't  armed it shouldn't go off?
My alarm works normally but if you remove the battery nothing happens.

[tunnie]

i did'nt do any other that replacing the battery on the 3.0 Elite, just unplugged, lifted new on in, reconnected. I did not take long, maybe 30/40 seconds between lifting out, and putting new one in with terminals in place?

Car was unlocked at the time 

[Dave DND]

Your alarm might well be working .. but sounds like your "powersounder" isn't !!

Powersounder is designed ONLY to activate if the main battery power is lost whilst the system is armed .. it is there to prevent a scrote disconnecting the battery before stealing your car ....

All depends on the internal software programming of the powersounder

Some do - Some don`t 

Always best to follow the procedure anyway, because once that thing starts sounding, it can be very irritatiting trying to reconnect the battery or removing the siren whilst its going off

 

[Andy H]

On my 1994 2.5 V6 if I didn't follow the procedure there wasn't a problem when I took the battery off (No powersounder on early cars).

The problem came on reconnection, the alarm would go off which is very irritating iff you have your head under the bonnet at the time

Maybe they made the alarm a little more intelligent (car unlocked therefore owner intentionally removing battery) but didn't update the instructions because it was too complicated to explain the car by car differences :-/ (disconnect within 15 sec safe on any Omega so don't confuse em )