[Tigers] gauge regulator??

[Stu Brennan]

The installed regulator has three connections: ground, through the
mounting lug, "+12V", the battery voltage, and the output, which is....
Either the battery voltage or 0, switching between these several times a
second, so that it averages out to about 10V.  See my tech tip on
TigersUnited for details:

http://www.tigersunited.com/techtips/BrennanGauge/rt-BrennanGauge1.asp

Stu