J2000/Sunbird V6-191 3.1L (1992)
Temperature Gauge: Description and Operation
Coolant Temperature Gauge
With Tachometer
The Coolant Temperature Gage is operated by two coils. Battery voltage is applied to both coils. One is grounded directly and the other is grounded
through the Coolant Temperature Sensor (L4 VIN H) or Coolant Temperature Sender (V6 VIN T). This has 63 ohms resistance at 125°C (260°F) (hot
coolant) and its resistance increases at lower temperature. Resistance is approximately 1365 ohms at 40°C (100°F). This causes the current through the
sender and one coil to increase as the coolant temperature increases. This moves the pointer.
Without Tachometer
The Coolant Temperature Gage is operated by two coils. Battery voltage is applied to both coils. One is grounded directly and the other is grounded
through the Coolant Temperature Sensor (L4 VIN H) or Coolant Temperature Sender (V6 VIN T). This has 63 ohms resistance at 260°F (hot coolant)
and its resistance increases at lower temperature. Resistance is approximately 1365 ohms at 100°F. This causes the current through the sender and one
coil to increase as the coolant temperature increases. This moves the pointer.
