Thanks
@Deaky, that saved me a lot of faffing about
That's a lot of copper for not much functionality. I'd reckon you'd need a signal wire to tell the car if the door is locked or unlocked, 2 wires for the solenoid to lock/unlock, and a ground. I wonder what the other 2 are for? I'll throw the doors in the too hard basket for now (leaving on a holiday in a week), but I'll come back to it later.