is it normal on a abarth 2.4 when im parking and i press the throttle i can see the lights go brighter until i depress and they go dimm again, any more problems with this car and its being driven into the nearest lake lol

Mine does that, i dont notice with headlights as ive hid's but my brake,tail and reverse lights get brighter and dim when revved or moving steering wheel

and thats on the 1.6 stilo

Check voltage reading using software if you have that.
Possible faults

Clean or replace battery terminals and check earths.

Load test on battery.

Alternator fault.