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[PSABIN8951]

Does anyone know how to check out an alternator for correct operation off the car?
Ive just fitted a replacement from a scrappy to get car going but i think looking at it now old one only needed internal contact cleaning but i dont want to refit only to find its still knackered.
Only reason id like to change is scrappy one has a noisy bearing (fussy i know)

[Kevin Wood]

If you take it to an auto electricians or even a scrapyard they will often have a test rig that spins them over on a motor and checks output.