3 electrical gremlins

[Islander71]

I'm having some issues with my 2003 Multispace 1.9d. When setting off, the central display peeps and shows driver door open when it is firmly shut. This also seems to stop the central locking working - it momentarily locks then unlocks. If I manually press down the driver door locking button, using the key fob or the key in drivers lock will centrally lock all the other doors, and they will all unlock with key in drivers lock. I am assuming there is some sensor in the drivers door that is not working when the door is closed. Does anyone know where this is and if it is fixable?
  Second problem is the adjustable headlight aim. When headlights were on, the adjusting motors were constantly wirring, but the aim did not alter when moving the position switch. I have tried manually moving the bulb holder and reflector and the wirring has stopped and sometimes the aim will now adjust with the position switch - but not always working. I may just have to leave the position switch alone and hope the constant wirring motor struggling doesn't re-occur. Is the headlight a sealed unit with adjusting motor or is there a way to get into it to free it up or clean contacts? There is a white plastic bolt on a plastic motor extrusion - does this have anything to do with adjustments?
  Third problem is the airbag warning light is staying on. I have tried cleaning the  electrical connector under the drivers seat which at first cured it, but it is now back on and cleaning the connector has no effect. Is there anything else to try to sort this out?
   Thanks for any helpful advise.....

[notsofast]

I don't have specific experience of the door locking issue but I did a search and the links below, though not Berlingo-specific, might shed some light on it.  One of the youtube videos shows a sensor in the doorframe and the other shows one beside the latch in the door.

https://www.yourmechanic.com/article/wha...ncer-cates

https://www.youtube.com/watch?v=AX5RH5Gfug0

https://www.ifixit.com/Answers/View/2292...+to+go+off

https://www.youtube.com/watch?v=AXx6BGllPwI

https://www.hillmuth.com/post/door-ajar-light-stays-on

[brodfather11]

Did you check the wiring between the door and the body, the wires in there sometimes break with the door opening and closing, bending the wires.

The white nut on the motor is the adjustment

Sometimes the seat belt wiring under the seat has to be soldered to make a good joint before the light went out. Or cut out the connector and make a new connection

[Islander71]

Did you check the wiring between the door and the body, the wires in there sometimes break with the door opening and closing, bending the wires.

The white nut on the motor is the adjustment

Sometimes the seat belt wiring under the seat has to be soldered to make a good joint before the light went out.  Or cut out the connector and make a new connection

Thanks for your info and suggestions.
I did take out the door closing mechanism - a fiddly awkward job - only to discover its a sealed unit with no way to get in to clean the switch, so will check out the wires.
Does the white plastic nut on the headlight assembly alter the beam height or the sideways angle?

[ricc]

our m49 also has an airbag connector under the front passenger seat. only found it when cleaning the drivers one didnt cure the light

[bikerbaker]

our m49 also has an airbag connector under the front passenger seat.  only found it when cleaning the drivers one didnt cure the light

Yeah that ^^^^^^. 

My 2004 MS has suffered with the same over the years.

[ffrenchie]

Did you check the wiring between the door and the body, the wires in there sometimes break with the door opening and closing, bending the wires.

The white nut on the motor is the adjustment

Sometimes the seat belt wiring under the seat has to be soldered to make a good joint before the light went out.  Or cut out the connector and make a new connection

Thanks for your info and suggestions.
I did take out the door closing mechanism - a fiddly awkward job - only to discover its a sealed unit with no way to get in to clean the switch, so will check out the wires.
Does the white plastic nut on the headlight assembly alter the beam height or the sideways angle?

The adjustment is for the beam height when the back end of the vehicle is weighed down and points the lights at the sky 

[brodfather11]

Sorry, On the B9 the white nut is for the fog lights, not the headlights.

Not too sure about the m49 h/lights adjusters