New Battery

[di.paul]

I have fitted a new battery to my 2001 2ltr petrol, since then I've had problems with the central locking, intermittent misfire, and there is no power to the radio, any ideas please?

[coastline taxis]

do a bsi reset. its in the pinned topics, re the stereo if its a after market one you may need a code

[di.paul]

wot is a BSI reset ?

[coastline taxis]

go to the technical section in the c5 forum. top of the page says pinned topics ( in green). you want the 6th one down bsi reset. there is a proper procedure for replacing the battery

[paul.h]

If all you ever need to do is disconnect the battery I have found the following from the C5 technical section Common Problems pinned topic works

16. Odd electrical problems caused by wrong battery disconnection procedure.

If you need to disconnect the battery and not do a BSI reset procedure, I have found the following has not given me any problems on a 2004 and 2007 C5 and a 2003 C3:

- remove the ignition key from the car

- open the bonnet

- wait a few minutes for the BSI to shut down

- disconnect the battery negative terminal

 

When reconnecting

- ignition key out of the car

- reconnect the battery

- wait a few minutes

- insert the key in the ignition and wait a minute

- turn the key to the first position and wait a minute

- turn the key so the dash lights come on and wait a minute

- start the engine

- take the windows down and up to reset the anti pinch

- reset the clock (and radio on the C3).