Steve wrote:
hi,
Fiat Punto 1.2 petrol w reg year 2000 has apparent varying light brightness
to headlights and interior lights.
when stationary and rev engine lights tend to brighten then dim. this
applies also to interior lights. When driving along the road in darkness,
the lights tend to vary in brightness.
any ideas ?
Steve for a friend.


It will do that to some degree normally, but if it varies greatly I'd
suspect the alternator or the regulator contained in it.