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[Magwheels]

Remove it and drop in a bucket of water/beat to a pulp with a club hammer.


That's the best bit of advice I have seen on here for ages !!    ;

[Andy H]

I have decided to put a new battery on, the present one was fitted 7 years ago. I can remember when if you got 2 years you were doing well.To prevent loss of radio etc I have in the past connected my 12 volt golf battery to the connecting leads before removing the battery.You worry me about blowing up the electronics on the car .Should I just take the battery out without a back up and then reset whatever needs doing.

That is what I do.

Kevin Wood posted a guide  How to fit line level outputs to a CCR2006 - in that guide he described how to switch off the need for code entry after power loss.

1) Disable code protection on the unit (optional).

I found it convenient to disable code protection on the CCR2006 before starting work. This is because I knew the unit would be in and out of the car a couple of times during the procedure and because I wanted to test it on the bench (without the MID connected!) once modified. I suspected that entering the code without a MID would not be easy.

The code can be disabled by powering up the unit with AS held down until a beep is heard, then using buttons 1,2,3 and 4 to change each of the digits displayed until the displayed code matches that on the car pass. Finally, AS should be held down once more until a beep is heard.

Removal of the code can be verified by powering up the radio and checking that "CODE" does not appear on the MID.

[robson]

Is there a guide to reset windows after battery removal?

[Doctor Gollum]

It's in the owners manual 

Basically, press and hold the switches down for 1-2 seconds and then up. Should hear a faint click from each door both down and up... 

[Andy B]

It's in the owners manual 

Basically, press and hold the switches down for 1-2 seconds and then up. Should hear a faint click from each door both down and up... 

They reset on just the 'up' 

[Doctor Gollum]

We've had this debate before, but without an Omega on the drive, we will both have to trust our memories... 

It is in the manual though

[Andy B]

We've had this debate before,  ....

I know 

[robson]

thanks for the replies

[robson]

I have discussed with the manufacturer of my charger Gunsons 4138 the point of whether my charger can be used with the battery in situ.They say that the chance of compromising the electronics is minimal but as  there is a risk they must advise always to disconnect the battery from the car.

[Andy B]

....
 they must advise always to disconnect the battery from the car.

which is far easier said than done on some cars. My Merc's battery is under the driver's seat which effectively means removal of the seat first 

[johnnydog]

I have decided to put a new battery on, the present one was fitted 7 years ago. I can remember when if you got 2 years you were doing well.To prevent loss of radio etc I have in the past connected my 12 volt golf battery to the connecting leads before removing the battery.You worry me about blowing up the electronics on the car .Should I just take the battery out without a back up and then reset whatever needs doing.

You can buy a device quite cheaply that plugs into  the OBD port and has two leads with crocodile clips that you connect to a spare battery / golf battery / 12v household alarm battery, which retains all settings until the new battery is fitted. It has led lights that let you know all is well to disconnect the battery.
There are others that plug into the cig lighter socket but I prefer the OBD type.

As to charging a battery on the car, I have two. Both state that the negative lead should be connected to a strong earthing point not the neg trerminal of the battery, and as far away from battery as possible, although this is dictated by the length of the leads.
Some modern cars have specific positive and negative terminals away from the battery specifically for charging / jump starting purposes.

[robson]

When purchased my car had a Blaupunkt  radio fitted.I changed my battery 7 years ago but cannot remember if I had to enter a code for the radio (maybe I attached a separate battery whilst making the change) I have the Vauxhall code but no Blaupunkt code I  assume that this will not be of any use.This is my reason to ask earlier about fitting a 12 volt golf battery to the battery leads whilst fitting the new battery to maintain power to the radio. Any thoughts

[dave the builder]

I've attached another battery via thin cable (rather than bulky jump leads) while i swapped the battery before on my mum's car , she cleaned out the glove box and lost the code / car pass 
no problem , provided you don't mix up polarity

[robson]

Thanks I should have added to my post  that I have the Blaupunkt manual and there is no mention of codes.

[Doctor Gollum]

Wouldn't worry about it