Top man, I’ll get the circuit diagram out later & have a look.
I’ve never been faced with a boot light problem, other than the bloody thing dropping out due to broken clips, (glue is the answer to that).
Due to my wife’s failing eyesight I have improved the boot illumination to such a degree that a pair of welding goggles are mechanically proffered for those with 20 / 20 vision, prior to the lid fully opening.
M