Very carefully
In my experience, most electric fans come on when the coolant temp sensor signals the computer to start cooling when the car has run up to temperature. Another factor is the fan relay/fan relay control module. I think just the fan clutch type start up with the engine.
where is low side valve located on a 1990 ford taurus?
cooling fan relay short or bypassed or defrost or ac selector on
Check your sensors.
The cooling fan on a 1993 Oldsmobile Delta 88 is located behind the radiator and the wires are attached on the left hand side. The relay is located on the frame near the left headlight.
Driver side front of car in the main fuse box block. Its marked.
Temp sensor not working, cooling fan not working, blown head gasket.
with a scanner
Answer To get an air bubble otu of the cooling system, let the engine run with the rad cover off. Let it run till the fan comes on. You will see that bubbles will come out as the car heats up.
the '93 Taurus has a 16 gallon tank
Engine cooling system and passenger compartment cooling system are two separate entities. A failure in one is unlikely to affect the other. Start with checking the thermostat, then you might want to have your radiator flushed.