Can anyone describe to me the wiring of the two temperature gauges on a single engine boat with one gauge on the flying bridge and the second at the helm seat inside? Are the two gauges in series with each other, both measuring the current flowing through the temperature thermistor. richard -- Richard Packard Professor Emeritus Physics Department University of California Berkeley, CA 94720 http://physics.berkeley.edu/people/faculty/Richard-Packard 510 525 0279