corsa td alternator/voltage regulator/wtf/help

[Prey]

ok so 93 corsa 1.5td

daytime running is fine and lights on at idle is fine, but when you have the lights on and rev it to 2k the lights/dashlights etc start to pulse. is it new alternator time or is there a regulator etc on these that can be looked at?

cheers in advance (flocking discount for a good answer lol)

:thumb:

[windfreek]

have you put a multimeter on the battery yet whilst its running with no load, if so what voltage are you getting and what do you get at 2k rpm?

[windfreek]

ie if it goes over 14.5v and keeps climbing as you rev more then yes the reg is dead

[Prey]

i haven't had chance to run it warm yet but cold across the battery terminals i get 12v with no increase with revs - so i'm guessing the alternator is dying?

[windfreek]

time for a new one i think, usually its a common sign on alternators for flickering lights when the reg's on its way out as it starts letting AC thru and watch out for voltage spikes as a duff alt can generate excessive levels in V+ and swing very quickly due to the AC