Central locking = Lights on

[C.A.R.]

Can't you use the original boot lock wiring? The standard boot lock on phase 3's doesn't have a key to open, just a button which activates/deactivates when the central locking is opened or locked.

I get what you mean.

The latch effectively doesn't operate if the boot is locked, but upon unlocking it you can release the latch to open the boot using the button. Without seeing how the button works I have no idea whether it's a switch within the boot button which operates a solenoid (same solenoid used to lock/unlock?) or whether the boot button is purely mechanical in operating the lever for the latch itself.

Basically, I have no f*cking idea what I'm doing.