Central locking issues

[mubienrulz]

hi!
I'm new to this forum. Just bought a 190e 89 model. it is a right hand drive since I'm in Australia. i noticed that the 2 passenger side doors central locking does not work. and even the driver's side rear takes a long time to work. the pump keeps running for a while and switches off. when the pump works i feel a slight vibration in all doors but not the rear passenger side. i wanna know where are the connection line's fitted for the passenger side. is it under the seat or in the firewall.

[Kynyption]

They are in the door and under the carpet. You need to take your door panel off to access the wires. And check the door lock actuators.