940 L4-2.3L SOHC VIN 88 B230F (1992)
Radiator Cooling Fan Temperature Sensor / Switch: Testing and Inspection
Engine Cooling Fan Ignition Advance System
1.
With timing light correctly installed and engine idling, connect a jumper wire between thermal switch connector terminals.
2.
The engine cooling fan should start to operate and ignition timing advance 5-10° on B-280 or 13° on B-230 engines as indicated by the timing.
3.
If not, replace thermal switch.