Fitted new battery about 2 months ago and everything was fine apart from loosing radio code. Patially removed radio to get code number off it and heard a few click and whirrs of relays etc even though ignition was off and no keys in ignition. when I came to start van it now cranks over but will not start. Not getting glow plug or engine management light to come on when key is turned. Checked fuses in both fuses boxes all OK. removed dash to check lamps for the glow plug and engine lights are ok and they are. any ideas on what to try next. really wished I'd not bothered with the radio now !!!