Interior and guage lights dimming in and out

[austinWS6]

My interior lights and guage lights are dimming in and out, and can see my amp gauge needle twitching. Anyone one else seen this? This is an '02 WS6 T/A. Maybe alternator is going? I've got 78k miles on the car.

[sunsetorangess]

sounds like an alt or loose ground, I would do a system charge check, normaly u can goto chinazone and they can hook up your car and it will tell you the issue.
I would personaly use a multimeter and start the car and see what the voltage is. See if its charging like it shoud or if its drawing power.
Also check your batter cables and the harness on ur alt.
J