That may be one of the proverbial "old wives tales." Book says do it. I have two very knowledgeable VW mechanics, one of whom has worked on thousands of VWs, tell me they never do it. Last one I installed I didn't do it and it works fine. But then again, the instructions that come with the generator says to do it. ________________________________ From: Robb <wuzmop@xxxxxxx> To: "tcb@xxxxxxxxxxxxx" <tcb@xxxxxxxxxxxxx> Sent: Sun, March 3, 2013 7:35:48 PM Subject: [tcb] Re: No VW show in Hilo bus trouble Did he polorize the genny when he installed it? Sent from my iPhone On Mar 3, 2013, at 4:10 PM, sammie smith <bugcollections@xxxxxxxxxxxxx> wrote: Denis: I hate to admit it, but I am an electrical dummy. Maybe Chuck can chime in; but from what you said you did and the fact that he has a new generator, I would suspect a bad voltage regulator. > > > > ________________________________ From: Denis Dodson <coocoo@xxxxxxx> >To: tcb <tcb@xxxxxxxxxxxxx> >Sent: Sun, March 3, 2013 12:05:50 PM >Subject: [tcb] No VW show in Hilo bus trouble > > >Dave has a new 12v generator in his 67 bus. It's the original set up. Last >night >as we drove out to Hilo he said that his red dash light was on and that it >usually goes out. I told him I didn't want to walk home from Hilo, so we tuned >around. Back home I put the test light to the terminals of the generator and >got >no light. then I out the red wire from the multi-meter on the positive post on >his battery and the black wire to the negative strap and got 12v. When we >started the engine it went to around 11.9 and went up and down when we revved >the engine. The meter never read above 12v. Did I do the test right? > > > >I am an alternator guy so I am in the woods with voltage regulators and stuff. >Tell me what to test and how to fix the problem. Hurry, we got markets today!