BMW Z3 Remote Roof Closing

[Koles13]

Hello Everybody!!

I am new here so sorry if I making mistakes of posting here
I would like to ask your help about wiring 2 relay to my car roof opening circle. I would like to operate with my trunk button from my remote which is a (-ve signal)
I have a DIY wire up but I don't know how to install those 2 relays Please help me to correct the diagram. (I started but probably its not okay)

"
The roof motor/pump is fed via one of the two violet relays (mounted on it), one is for 'open' one is for 'close'.

These have a permanent +12v all the time, ready to be swiched for the motor supply, but the relay coils are switched as follows.

The +ve for both coils is via the brake light circuit.

The -ve is fed via the roof microswitch, to the roof open/close button in the car, and then onto the -ve side of the relevant relay coil.

When all these conditions are met, ie foot on brake, roof flap lifted, the roof will move depending on whether up or down button is then pressed.

I have used two additional relays to mimic this:

1. 1.when switched, provides a separate 12v to the brake light circuit (BL/RT wire on the switched side of the pedal) and this energises the +ve side of the existing motor relay coils.

2.which is switched at the same time, provides the -ve to the existing 'close relay' coil.This -ve is sourced from the (BR/OR) wire on the back of the roof button (Its the -ve from the microswitch) and then goes (via the new relay's normally open contacts) to the Brown/Yellow 'close' wire on roof button (which in turn supplies the existing close relay on the pump.)

Both additions are linked in parallel,... dont disconnect the existing, just join new wires into those circuits."

Im looking forward for your answers Please help me

 

[Harald Kapp]

I doubt such a modification is legal. As I understand your description, by bypassing the brake light circuit such that it can be activated without actually braking, you would be able to open or close the roof while driving. Not only will this damage the roof mechanics, it may also lead to a dangerous instability of the car when the headwind gets caught in the roof.