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Mostly one side of the boot light is permanently live and the other side is earthed by a switch that operates when the boot lid is opened. The switch is sometimes in plain sight and sometimes it is operated by the hinge mechanism or might be buried in the boot lid catch itself and have a dual duty of telling the central locking and/or alarm brain the boot or tailgate is securely closed.
Sometimes a tilt switch is used and this will be found inside the boot lid.
Sometimes (rarely) there is no automatic switching and the light is supplied by the parking lights or tail lights and others must be manually switched on in the way of the cabin light.
this input is no good. we need country, car was sold (France?) year, , model car , and engine size and type. is a gasoline engine(petrol) or diesel.? did you lose the glove box operator guide. the warning lamps are all in that guide, you tell is?
your can check is it something stuck in the lock, first operate your roof either way, if you are going to open the roof as a first action boot lid will open to backward, let boot lid fully open and stop operating the roof, ignition off and have a look if something stuck you can see, if you are going to close the roof let close the roof and before close the boot lid stop operating roof switch, otherwise faulty boot lid lock, if faulty lock but you can try by mettle key blade which is in your electronic key, first take out mettle key from electronic key then insert mettle key in to the key hole in boot lid turn fully left and open boot if not work turn fully left and push it in, is this information helped you?
Are the fuses good? With the car off and the interior light on, if you try to operate sunroof, does the light dim? If yes, motor is trying to work but stuck. If light stays the same then motor not getting power. Fuses, wiring, bad switch, loose connection. Have to play detective.
There's a small possibility that mechanical cables or pulleys broken stuck, or worn out. Sunroofs look simple but they are very complicated!
Do the lights on the trunk operate when the parking lights are on, but do not light up when you apply the brakes? If so, this is normal. Only the outer red lights are brake & parking combination lights. The ones adjacent to the reverse lights on the trunk lid are parking lights only.
If the red lights in the trunk lid are not working at all, check the red/yellow and black/silver wires where they go from the trunk lid down into the right side of the trunk area. The wiring harness for the parking and reverse lights are contained in a piece of black tubing that is connected to the passenger's side trunk hinge.
get a cheap 12 volt test ($6 any parts store) light and have someone operate the different lights while u proble the wires, when the test light illuminates you tag that wire for what circuit was activated, brake, running, turn etc.
First of all the roof is not even soppose to operate while the trunk is open - So there is the first problem Ive been involved with BMW's for a long time and this is the first Ive heard of a roof opening while the trunk is open. There is a built in feature that tells the car not to open the roof if the trunk is open and the other way roung while the roog lid is open the trunk cant open.
The reason the roof is not working anymore as soon as there is stress on the roof the electric motors(One operates the roof and the other operates the roof lid) disengages, You said that the roof still worked but the lid did not so probably only the one motor disengaged. So what you have to do is open the trunk on the left hand side right behind the tail light pull away the material and simply just push the electric motor into place. that should fix your problem.
It may happen that the two motors have become out of sync, Disengage both electric motors manualy put the roof away engage the motors and that should put the roof and lid back into sync.