| : Not start and brake lights and warning lights on when locked? JackCooperS Apr 26th, 2012, 02:09 PM my 2003 cooper s will not start, its turning over but i have lots of warning lights on the dash such as eml, battery, airbag. when i lock my car these warning lights remain on and the brake lights are on. any ideas would be appreciated, common fault? thank you mab01uk Apr 26th, 2012, 04:36 PM Have you had the battery checked under load, is it the original BMW battery which could be 9 years old now? Low power or failing cell/faulty batteries can cause all sorts of strange electrical gremlins on Mini's even though they can often still turn over the engine. Water in the MCS rear boot battery well can sometimes cause problems if their is a leak in the rear hatch area which is not uncommon on earlier Mini's. JackCooperS Apr 30th, 2012, 05:42 AM Have you had the battery checked under load, is it the original BMW battery which could be 9 years old now? Low power or failing cell/faulty batteries can cause all sorts of strange electrical gremlins on Mini's even though they can often still turn over the engine. Water in the MCS rear boot battery well can sometimes cause problems if their is a leak in the rear hatch area which is not uncommon on earlier Mini's. The battery looks like the original, i havnt had that checked as it has never had any slow starting or power issues. i checked for water in the boot as iv known that to be a problem but no water at all. i think a diagnostic scan might be a better solution, it sounds like a short down to earth. its been really wet here lately and perhaps water has got into a plug. but thank you for the help =) mab01uk Apr 30th, 2012, 11:55 AM Recent similar problem turned out to be the unused option CD changer wiring connector lying loose behind the boot rear side panel with moisture in the connector......might be worth checking. JackCooperS May 4th, 2012, 07:47 AM Recent similar problem turned out to be the unused option CD changer wiring connector lying loose behind the boot rear side panel with moisture in the connector......might be worth checking. iv checked that plug and it is dry, no sign of moisture. got home last night and within minutes of locking and elaving my car the alarm went off, then when i tried to lock the car after turning the alarm off the doors kept unlocking themselves and the brake lights came back on mab01uk May 4th, 2012, 11:41 AM Maybe check the BC1 next for moisture or corrosion in connectors: The BC1 (Body Control Unit) - Forums (http://forum.minicooper.org/showthread.php?t=9924) | ||