I have some electrical problems on my new 1962 series 2 land rover, I cant get the lucas separate windscreen wipers or the petrol gauge working and the battery went flat so I bought a new battery, which has now gone flat. the dashboard is different to my other series land rover, it has a lucas ignition with h s and off positions, could I have discharged the battery by leaving it the wrong position? it is so flat that it wont charge.