After making the motification, all the original buttons will keep the same function and the fourth button will unlock the door from behind.
Here is the original schematic of the circuit that unlocks the doors and the modification to activate the fourth button.
The circuit of the wireless door lock before mod
The circuit of the wireless door lock after mod
A pin must be added in the connector of the door lock circuit in position 5 (this is the hardest part of this project)
I find a pin in annother connector at scrap yard, sadly I dont remember from what car model did i get it.
the pin
door lock connector wire in position 5
The wire to add must go in the central console to the right pin as pointed with the screwdriver
It would be easier to connect it in front of the connector, but it is better to connect it behind to keep the functionality of the connector. personally I have it connected behind.
You can't see it in the photo, but you must not reconnect the yellow wire which was there before I put my blue wire in the connector, otherwise it will blow fuse 22 under the dashboard
Here is the original schematic of the circuit that unlocks the doors and the modification to activate the fourth button.
The circuit of the wireless door lock before mod
The circuit of the wireless door lock after mod
A pin must be added in the connector of the door lock circuit in position 5 (this is the hardest part of this project)
I find a pin in annother connector at scrap yard, sadly I dont remember from what car model did i get it.
the pin
door lock connector wire in position 5
The wire to add must go in the central console to the right pin as pointed with the screwdriver
It would be easier to connect it in front of the connector, but it is better to connect it behind to keep the functionality of the connector. personally I have it connected behind.
You can't see it in the photo, but you must not reconnect the yellow wire which was there before I put my blue wire in the connector, otherwise it will blow fuse 22 under the dashboard