TomLS Posted June 7, 2012 Report Share Posted June 7, 2012 Hi all,My friend has a 1.4 Lupo, and recently the alternator failed. Off I went to ebay and bought a second hand replacement, and tonight I fitted it (Had to drop the engine on its mounts - good design or what...!). The new unit was a Voleo (or something like that!), and the one I removed was not, but both were 70A and otherwise identical.On restarting the car, I let it idle, pulled a terminal off the battery, and let the car run for 5 minutes, which it did without interruption. The test meter reads a steady 13.8v at idle, and 14.2v after about 1500rpm, and the un-loaded battery was 12.4v, so all fine there.However when I got in the car I noticed that the battery charge light (which with old alt, was constantly on), to be flickering randomly, sometimes fast, sometimes on solidly - at idle,sometimes off altogether, but with no repeating pattern.The voltage it produces is constant under load, it has been driven for 20 minutes with a previously knackered battery, so the alt appears to be working fine, and the 2-pin plug on the back appears to be fitted securely.Anyone got any hints?!Tom. Quote Link to comment Share on other sites More sharing options...
TomLS Posted July 2, 2012 Author Report Share Posted July 2, 2012 Bump.The light is still flashing sporadically, but the vehicle is still working fine, nearly a month on.Any ideas? Quote Link to comment Share on other sites More sharing options...
Wee Sprocket Posted July 3, 2012 Report Share Posted July 3, 2012 I don't think it was a good idea to remove a battery lead when the engine is running. It may be that the diodes have been damaged.To test the alternator set your meter to DCvolts at the nearest scale above 12 volts and connect red to +ve and black to earth with the engine running.12,4 volts on an unloaded battey, after leaving for atleast 6 hours would tend to indicate that the battery is not fully charged.WS Quote Link to comment Share on other sites More sharing options...
treblet Posted July 3, 2012 Report Share Posted July 3, 2012 I don't think it was a good idea to remove a battery lead when the engine is running. It may be that the diodes have been damaged.This.Why exactly did you think it would be a good idea? Quote Link to comment Share on other sites More sharing options...
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