Right. Was recalling my Motronic ECU while composing my reply.

I may be misunderstanding, but if you're thinking of connecting a
brown/white from ECU to chassis, that doesn't sound correct.

The ECU will need a constant ground that it would use to supply grounds as
needed to various components connected to it.

looking here

http://www.wiringdiagrams21.com/wp-content/uploads/2011/06/VolkswagenVWEurovan2.5LEngineControlModuleWiringDiagram.jpg

I see a brown/white ECU 28 to several things. It looks like its a "supplied
ground" switched inside ECU.

Neil.

On Mon, Oct 21, 2013 at 10:55 AM, Dick Wong <sailingfc@dslextreme.com>wrote:

I noticed that there are brown/white wires going into the ECM.  So those
> are only grounded when the ECM is "on" or ECM programming switches it to
> ground?  What if I connected the brown/white wire directly to a ground lug
> on the chassis?
>
> Thanks.
>
>
> On Mon, Oct 21, 2013 at 10:45 AM, Neil N <musomuso@gmail.com> wrote:
>

> brown/white is for switched grounds?   (i.e. for dome light)
>>
>>

--
Neil n

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