Peugeot 206 1.4 Alternator

Good estimates. I am new to this and I would like to know about your experiences. It turns out that the alternator of my car sometimes does not deliver 14 ... VDC and that implies that the battery is downloaded, and taken to two alternating workshops and have tried it and passed all the tests, I install it and return the fault, this is intermittent, they rectified the collector and changed the regulatory box, it will be that it is going with the exciter The witness of the board and the other must be the exciter.

Some friend who helps me in something. I will be grateful.