Alternator low output

[Brenner5]

i am getting weird signs from my alternator and i think its had it..

i have a voltage reader in the car and when i start the car the reader
shows the battery output at 10.6/7 but when i begin to drive and rev it to about 3000 rpms, the reader shows the battery output at 11.6/7ish

but when i go to about 5000-6000rpms the voltage reader gets to the point where it should be at which is 13.6..


if i dont rev it much it and drive slowly the output of the battery does not rise and i can also tell as it is not charging my battery and the lights dim out etc

any ideas as i have checked the wiring etc

[kam-325i]

It sounds like the regulator on the altenator might be on its way out.

[Brenner5]

is that something that can be repaired or best to replace the alternator?

[Brianmoooore]

Easy to change or check - just undo the obvious nuts/screws on the back of the altenator.
You'd probably be able to get a good second hand altenator for less than the price of a new regulator pack though.
If you go for an exchange altenator, make sure you remove the pulley from the old one before you exchange it - they don't normally come with a pulley fitted.