As you stated you can make the windows work by applying 12 VDC to the switch plugs .
IIRC , the windows have the power run directly to them and the switches operate the ground paths...
This one should be fun if frustrating to figure out .
-Nate
Kevin wrote :
>
> The connections are clean. Yea, the switches are new. Don't think there is
> a problem there.
>
> Thanks,
> Kevin
>
> On Tue, Feb 5, 2013 at 8:24 AM, n61cm wrote:
>
> > **
> >
> >
> > It must be something between the switch and where you have jumpered.
> >
> > Did you test the switch resistance to make sure they are working? I doubt
> > if new switches are bad...
> >
> > Maybe the connector(s) have crud in them?
> >
> > Jim
> >
> >
> > --- In diesel_mercedes@yahoogroups.com, Kevin Seuferer wrote:
> > >
> > > My other problem with my 85 300D is the windows.
> > >
> > > I have jumpered from the battery to the connections in the center
> > console.
> > > All 4 windows will roll up and down by applying 12 volts from the battery
> > > directly to the wires in the center console. I have replaced both sets of
> > > window switches with BRAND NEW switches. When I turn the key on, I get 12
> > > volts on the front terminal of the front window switches. Yet, I cannot
> > > make the windows go up and down with the switches. All of the fuses are
> > > brand new.
> > >
> > > Grounding problem possibly?
> > >
> > > Any suggestions would be helpful.
> > >
> > > Thanks,
> > > Kevin
> > >
> >
> >
> >
>
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