2003, XK8.
I keep battery tinder on her so battery is nice and full.
I opened up the door, all the interior lights came on.
Inserted key, turned and all the normal dash lights came on
turned the key to start and there was a pop and everything went dead.
I tried turning the key a few times and it was dead as door nail.
No dash lights, no interior lights nothing.
Then I heard a clicking sound, it was def at regular intervals. The click was every few seconds and then I noticed there is a faint red light on the oil pressure indicator and battery and slightly flashes on/off when the clicking sounds happens. It is not very bright.
After removing the key from the ignition entirely, the clicking sounds (and the faint red lights) continue to appear.
I had to remove the terminals off the battery to get it to stop. I didn't want to leave it like that in my garage of my home in case of fire.

Thoughts?
Relay?