Hi, i have an alternator that will charge the battery below 3000 rpm, but above 3000 rpm it doesn't work, what could be wrong and is it easy to sort out?

many thanks

tom

regulator?

Some are replaceable some aren't


Cheers

Mark

1st step is check the connections at the back of the alternator are clean a tight -- they handle a lot of amps.

2nd Step is check the drive belt is tight enough

3rd Step is check the charging voltage off load and under load


However if the connections are sound most likely the alternator regulator is knackered -- how easy to fix depends on the type Lucas-Magnetti Marelli ones area a dawdle if you can get the parts,

its from a v6 mondeo ST24 engine, hopefully the regulator is replaceable?