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Re: [T3] GEN light on AGAIN!

This is really strange... with the D+ connected, grounding the DF will
essentially "Floor" the generator to max output manually... (only do this at
idle for testing).  Your results suggest generator is bad.  Make sure its
grounded... perhaps some paint or rust under the strap is isolating it.

Sounds like you know what to check... the only other thing Ive seen is field
winding connector wires rubbing against the screws and through thier
insulation, shorting them out.

You can with a little effort and care get your hand around and squeeze BOTH
brushes in a little... if this doenst put your light out then the brushes
are probably OK.  IF you get desperate enough Ill rebuild one of my Cores
for you!


Keith Park

Top Notch Restorations
71 Squareback
65 Notchback
65 Squareback
75 Opel
87 Golf
88 Rx7 10th Anniversary

----- Original Message -----
From: "Mike Wodkowski" <wodkowski@mac.com>
To: <type3@vwtype3.org>
Sent: Thursday, November 20, 2003 2:40 PM
Subject: [T3] GEN light on AGAIN!

> OK so I got a brand new Bosch rebuilt generator.
> Held on to the old one for a week, sent it off yesterday afternoon. Last
> NIGHT the Gen light comes on. What now?
> Here's the story.
> This new generator ran fine for about a week.
> The generator is properly installed with the dot aligned with the line.
> At the hot fuse I get 12V power.
> With DF disconnected, I hooked my VOM to + at D+ and - to ground. I show
> about 3V (not kidding here. 2.5-3V)
> When I ground the gen DF terminal, there is NO fluctuation at all.
> The little screw holding the 2 straps inside the gen is there.
> The wires going to DF and D+ appear to be intact and stable.
> The brushes are FINE and good, and the commutator appears to be properly
> undercut (no ridges, no scarring)
> Pushing down on the brushes with gen fully hooked up produces no result.
> Does not change light.
> With D+ disconnected, resistance measure WRT ground is 9 ohms.
> (doublechecked that figure, so yes it is 9 with VOM at Rx1)
> FAST idle makes gen light dim, but does not change voltage measurement at
> fuse, which stays at 12.5 V
> Belt is not loose.
> What could I possibly have done wrong? I didn't install the brushes, but
> they are screwed on good and tight. I pulled them out and put them back
> but no difference.
> Do I just have rotten luck and now have a generator that's bad in a
> different way?
> This is getting to be a serious drag.
> -M
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org

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