940 SE L4-2320cc 2.3L SOHC Turbo VIN 87 B230FT (1991)
Coolant Level Indicator Lamp: Description and Operation
The coolant level sensor is located in the coolant expansion tank and consists of a magnetic float which closes a switch when the coolant falls below
MIN level. When the switch closes, a lead on the instrument panel is grounded and the warning light comes on.