How to unlock 95 jaguar trunk won't open with key or button?

SOURCE: 1995 jaguar xj6 dead battery and can't open trunk. please help,

you will need to use a jump box to put 12 volts to the engine compartment fuse box .Then you can
open trunk with key bob or button in car.

SOURCE: Jaguar XK8 Valet key not working correctly

I have seen this before, each time i have seen it i have to reprogram the valet key. This needs to be dont at the dealership, make sure you bring the master key otherwise they cant program the valet key.

SOURCE: The trunk of my 1995

hi. this happened to me years ago. under the rear numberplate when removed there is a lever or
latch to open boot. good luck
michelle

SOURCE: I can nit open my trunk on my 1996 jAGUAR XJ6.

ok, if the key won't open this then the lock is jammed and if you don't want to damage anything, I know I wouldn't, I would take it to a mechanic. The jammed may have been what killed your battery if the valet trunk open was not working it may have been shorted out. There is a way to jump vehicles with the battery in the trunk like that but I am not familiar with it and if the buttin doesn't work to release the trunk it would do you no good anyway. most likely you are looking at replacing teh truck locking mechanism.

SOURCE: cant get my 99 xj8 out of valet mode, and my trunk will not open.

There are Valet keys (often with a green knob) that will
only unlock the front doors and the ignition but not the
glove box nor boot/trunk.

When either the front door locks or the console button is
pressed, all the doors should lock. Likewise, when either
front door is unlocked, all the doors fuel filler lid and if
selected, the boot will also unlock.

Boot lock has three positions. Unlocked to the left,
automatic with the doors in the center, always locked to the
right. Simply remove the key in what ever position you desire.

The locks can get confused and not work correctly. Simply
sit in the car and manually lock all the doors. That will
usually get the locking module sane again.