[Vwdiesel] Voltage Stabilizer

Roger Brown r.c.brown at ieee.org
Sat Mar 29 08:09:45 PDT 2008

Rudy wrote:
> So, if the Fuel and Temp gauge are steady and consistent, I can assume its
> working as designed.  ??
> Thanks for the responses.  I think I understand, should be able to test it
> on the bench now.  Rudy

Yes, I think that working gauges is a good indication of a functioning voltage stabilizer, 
since it is what supplies a steady voltage to the gauges.

And why is that important?  Most of the senders for the gauges are variable resistance 
devices.  Then a simple current  meter is used for the gauge, by sending a constant 
voltage through that varying resistance (in the sender) you get a varying current that 
shows up as needle movement on the gauge.  If that voltage were to vary up and down with 
load on the alternator, you would see your gauges moving up and down with the changes in 
the system voltage.



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