Hey Grunter,
I replied in your previous thread.
You have a flat battery.
The flickering lights and starter motor solenoid clicking on and off are a giveaway.
You jumped the car, so it will start as you are giving it power it needed.
Keep an eye on parisitic draw and also the state of your battery, as when you took it for a drive, the alternator gave it a bit of charge, but it may drain again.
Cheers,
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'95 XJ I6 4.0 AW4 NP242,
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