Skylark L4-138 2.3L SOHC VIN 3 MFI QUAD 4 (1992)
Temperature Gauge: Description and Operation
Coolant Temperature Gauge
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 Sender. This has 38 ohms resistance at 140°C (280°F) (hot coolant) and its resistance increases at lower temperature.
Resistance is approximately 1310 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.
