Hans Neureiter wrote:
Tried this. No humm anywhere on this band. What symptoms do bad brushes show?
Not sure that an OM606 has an alternator similar to mine but if it is, unscrew the voltage regulator/brush assembly on the back of the alternator and LOOK at the brushes. If they are serious worn (mine have all been seriously worn by about 135-150kmi) replace the regulator brush assembly. Here's a picture of the brush assembly: http://img.eautopartscatalog.com/live/F401039368BOS.JPG
Marshall -- Marshall Booth Ph.D. Ass't Prof. (ret.) Univ of Pittsburgh School of Medicine Department of Pharmacology 1300 BST Pittsburgh PA 15261 USA [EMAIL PROTECTED]