Check amplifier box – ISSPRO EV Temperature Gauge User Manual
Page 2

Check Amplifier Box
1. With power off disconnect 2 wire connector at the temperature sensor.
2. Make sure the four wire connector going to the gauge is connected.
3. Turn power to gauge on.
4. Using a multimeter on the voltage setting check voltage at the gauge.
100°F to 240°F and 100°F to 280°F
Green(+)/Yellow(-)
Temperature Sensor Output
Gray(+)/White(-)
1.6 Volts
Open
-1.2 Volts
#
1.5 Volts
120°F
1.8 Volts
#
-0.3 Volts
140°F
1.6 Volts
# Connect temperature sensor for these measurements.
140°F to 320°F
Green(+)/Yellow(-)
Temperature Sensor Output
Gray(+)/White(-)
1.4 Volts
Open
-1.6 Volts
#
1.6 Volts
140°F
-0.6 Volts
#
1.4 Volts
180°F
1.4 Volts
# Connect temperature sensor for these measurements.
5. 140°F to 320°F temperature sensor may need heated using another heat source
because the engine does not heat temperature sensor above 140°F at idling.