Pulsing headlights...some more info - Alfa Romeo Forum
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Pulsing headlights...some more info

Ok, as posted a while ago I'm suffering from the pulsing headlight and dash display issue. The belt looks ok, couldn't figure out how to get it off though. Multimeter across the battery with the engine running gives an unsteady readout ranging from 12Vish up to 14Vish.

Based on this, I'm leaning towards a rectifier and/or alternator fault. Could anyone back me up on this, or am I thinking wrong?

Also, would voltages like that be enough to fire up erroneous MCSF messages? I'm suffering with them intermittently. Got a cable on order to plug it in to MultiECUScan, but it's not here yet so can't expand on that any more.

(Also thrilled that the new Circoli stat I fitted is fauly, leaking along a seam. Not impressed; nor am I impressed with ECP customer service right now!
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Just sounds like a faulty regulator more than anything else.

However, it could also be a slipping alternator freewheel pulley. Belt will turn the pulley but the pulley will be slipping on the alternator shaft preventing it turning fast enough. I'd expect some funny noises from the pulley if this was the case though.
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headlightssome , info , pulsing

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