1989 Toyota Corolla 2bl Fan not coming on to cool radiator

Try installing a jumper across the N/O terminal at the relay socket. Temp sensor in the radiator or in the thermostat housing supplies the signal for the relay the other relay signal is supplied by A/C in on position. both fans will run continuous with A/C on. One fan runs intermittent relative to water temp. Be careful not to blow a head gasket. If you leave the jumpers in place, the fans will stop when the ignition is turned off, save the engine until you isolate the relay signal problem. then simply remove jumpers and reinstall the relays

Well the code is for the circuit - the computer commands the relay to turn the fan on and it doesn't happen.
The computer provides the ground for the relay.
If you have replaced the relay and the fan and the fuse still blows, I would look for a problem in the harness between the fuse box and the fan, including the ground circuit for the fan.
The fuse for the cooling fan is usually a 30amp marked "cooling fan" in the fuse box in the engine compartment.
Do you know what the 25amp fuse that is blowing is for ?

The relay in engine compartment fuse box.
For its exact location and wiring diagram,click the link below:----Hyundai Sonata cooling fan not working http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html
---------------This will help.Thanks.

Probably the temperature sending unit...if not that the relays...they should be relatively cheap and easy to replace...

temperature switch. The temperature switch finishes the circuit for the cooling fan. Once the engine reaches the specified optimal temp. the switch completes the circuit and turns the cooling fan on. Hope this helps

For many of the 90's and 2000's Toyota various models - Camry, Tacoma, 4 Runners, Corolla, and some other models overheating is usually caused by temperature sensitive fan switch on the radiator not operating. Electric fan on the radiator should operate when temp above 200 degrees. Less often the control relay 90987-03003 is defective. Check if bubbling in the radiator smells like exhaust. That would indicate a blown head gasket. A jumper wire from your marker light positive to the lower contact in the fan control relay socket will operate your fan when parking lights are on. The larger vehicles with more powerful radiator fans will need a hefty jumper from a headlight positive to avoid overheating the lighting wiring. Make sure the engine is off and warmed up to check the radiator core with your hand to see if it is getting circulation. If it is all cold the thermostat might be stuck.

it my be a relay or the temp unit

CK with Toyota dealer, he can tell you where the fuse box is.

sounds like it maybe is the electric fan and or relay not kicking in. Do you have a/c in this vehicle? If so, let vehicle sit running, and watch tempature. Fan should come on. If not, turn on a/c to see if fan kicks on. Can possibly be temp sensor.

it seems to be a relay or fuse. or the temperature sensor. it is usually on the radiator or the engine block.