What is boot open on jaguar xj8?

Many cars have a switch connected to the boot lock to alert the driver if the boot (= "Trunk", to our American friends :) ) isn't closed properly. Chances are, esp with an older car that you have either a) a faulty switch, or b) another fault somewhere else in the electrical connection If you like me have a 1997-2003 X308 model at least, there is a wire from the switch (and the interior boot-lights) running underneath the right boot-lid hinge. OVer the years this wire can have been damaged or flexed too often; have a look; it is quite feasible to repair this yourself it you have DIY skills. Best to add a new piece of wire and allow for movement, but cable-tie is a bit out of the way. If you're worried you can still self diagnose and get a car electrician to fix it in minutes.