1. bootlid wiring harness; requires cleaning out the boot, getting a sore back: You have to lie on it to look up and work under the rear parcel shelf where the wires may have worn through their insulation. If your boot shocks are dead its a good time to replace them too- stops the boot closing on you (you won't be able to get out). You need some solder, an iron, strippers and pvc tape, monkey hands and a torch. Try to avoid dripping hot solder or bits of copper wire in your eye
2. Drivers microswitch; Might need replacement.
3. Check your battery is charging ok, alternator belt and battery just in case the shorts (if you have them at the end of the the bootlid wiring harness) have worn it down.Nick