Hi hope i have found the site to my problem!

Hi am new here as i have just encountered the mother of problems on my RR L322 TD6 not too sure how this forum works but il stick with it, and solve some issues for some, however, my problem is baffling me and ready to purchase Bearmachs diagnostic but i thought i check here first and hopefully save a bit of time, money and stress, so my Range Rover had intermittent key starting problem, so from what i have found out i changed the electrical component on the ignition switch. Now i have no electrics whatsoever, if i lock the car manually the alarm starts beeping 5 mins later. no dash lights nothing, checked all the obvious to no avail. HELP!