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[Joe the fish]

Like I said I’m not convinced the voltage drop to 0.4 was anything other than the multimeter, so pretty much disregarding that for now. The voltage output from the alternator was still low at barely over 12v regardless of load or revs. Double checked the questionable multimeter on a known good car (my dads brand new Mazda) and readings for that were 14+ volts as expected with a decent alternator.
So still settled on alternator shagged but won’t hear back from the repair place till next week now. Not ruling out anything additional but I’ll be chasing my tail lookin for anytelse with a dodgy alternator.

[Kevin Wood]

Often alternator failures are down to a failed regulator, and pattern replacements can be had for £20 or so. Hopefully the refurb guys will fit a new one.