New Holland T8010 Manual page 1002

Test
Test cab temperature sensor: Pin 21 to Battery GND
Condition(s): Keyswitch ON and ATC Switch to "AUTO"
10
Expected Result: 0.5V at 70°F (21°C) at the sensor. Voltage decreases as temperature increases.
Actions: If no voltage, replace the controller.
If voltage out of range for temperature, test sensor. See sensor test.
Test temperature control pot output: Pin 29 to Battery GND
Condition(s): Keyswitch ON and ATC switch to "AUTO"
12
Expected Result: 0.0 to 3.0V while turning temperature control from full CCW to full CW
Actions: If no voltage, replace the controller.
Test blower speed control pot output: Pin 28 to Battery GND
Condition(s): Keyswitch and A/C switch ON
13
Expected Result: 0.0 to 3.0V while turning blower speed pot from full CCW to full CW
Actions: If no voltage, replace the controller.
Test mode door control pot output: Pin 30 to Battery GND
Condition(s): Keyswitch and A/C switch ON
14
Expected Result: 0.0 to 3.0V while turning mode door control from full CCW to full CW
Actions: If no voltage, replace the controller.
Test Defog/Defrost switch control function - : Pin 25 to Battery GND
Condition(s): Keyswitch ON and ATC Switch OFF
15
Expected Result: 5V
Actions: If no voltage, replace the controller.
Test ATC switch control function - Automatic mode: Pin 26 to Battery GND
Condition(s): Keyswitch ON and ATC Switch OFF
16
Expected Result: 5V
Actions: If no voltage, replace the controller.
Section 50 - Climate Control - Chapter 1
CONNECTOR J8 TEST POINTS
Instructions and Actions
50-1-31