alternator not charging

[tbs]

hi guys any ideas what could be the problem the alternator is nt charging but when it was taken off and repleced with a working same issue no charging then i go tthem both tested and the alternators work but dont charge the battery any suggestions would be helpful ?

[Lofty79]

check the earthing points arent corroded, and that it is attached to body and to ground, then check the powerline to the battery, and any other earth points straps or whatever the engine uses.

It is also likely to be alternator relay.

try wiring first as thats just time, drawing a blank then try testing to alternator relay.

my guess would be more likely a 1: corroded battery negative terminal, 2: chassis ground dodgy 3: alternator wiring and ground, 4: alternator relay, 5: fuse related to alternator.

Hope that helps

[jimma04]

Do you have a batt light with ignition on non running ???

[tbs]

no it didnt apparently the alternator is fine and the voltage regulator i have cheked the wire from battery to alternator and that pushes through current fine i just don know what else it could be and theres not many good mechanics around where i live

[batteryman]

Sounds silly but does your battery charge off the car? Dud battery can give you all sorts of odd problems.

[tbs]

no it dont sound silly but that the first thing i checked but i had a hunch it would definately be something to do with alternator itself chacked battery checked wiring to it opened up the alternator turns out to be the voltage regulator it should all be sorted now thank for your help guys