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Bad alternator... 900 1994

posted by  myVolvo940 on  Fri Nov 18 05:27 CST 2016
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My battery has been unexpectedly dying while left over night. I did the usual fuse tests, found a couple of non essential things, so removed the fuses, but the the problem persisted. I've just checked my alternator, it's giving out 13.5 volts, but doesn't hold this voltage under load. Changing the multi-meter to AC I see an AC voltage of 26 volts (ouch). So I guess this means one of the regulator diodes is broken and needs replacing, I think this could also explain the battery drain overnight. I'm currently disconnecting the negative lead for long periods of standing.

My question is, is it okay to drive the car like this for a couple of weeks, or will the AC out of the Alternator damage the electrics, battery and or other things?






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