Hi: Suddenly in the middle of the night my switch went into alarm mode waking up me and probably neighbors. Is is under that big flat plate over the radiator or behind grille or what is step by step please to get at it? Thank you. --Tom in Tucson

 

If you're standing in front of car facing it, the bonnet security switch is on your right between the strut tower and the fender on the heavy metal plate. The switch is suppose to be covered with a rubber boot. If the boot has been displaced the switch will not be depressed far enough to tell the system that the bonnet is closed.
To remove the switch, I've found it's best to remove that heavy metal plate. Then you can get at the bottom of the switch and pinch the tangs that hold it in place.

 

If it had been any bigger, I might have smacked my elbow on it. Since my car is black and the rubber is black, I guess there was a camouflage effect which works great!
It turns out a wire from the harness had a nick in it right under the connector which eventually went open on the copper itself. I stripped it back and soldered and taped it. The switch itself is fine. But beware those little tangs. They are engineered for about 1.5 in-and-out cycles. One just sheared off when I went to flare it back into position.
So thank you GREEN MACHINE for the guidance. --Tom

 

Can you please tell me how i open my jag x type bonnet

 

The cable release handle in just inside the drivers door on the edge of the kick panel pull that. The there is a yellow handled lever back of the grille that you reach with your fingers from the bottom of the grille. Pull that handle towards you and lift the bonnet up.