I am trying to get my cooling fan going. I jumpered the motor and its good. I went and got the cooling fan switch but I can't find the darn thing. Your post on the issue says top right rear of the engine but I'm still not seeing it. its a 89 camaro rs with a 2.8 in it.

first check your fuse this should always be the first thing you check no matter what before you spend$$$$ if the fuse is good locate the cooling fan electrical plug create a jumper wire and connect it to the positive wire and see if the fan comes on if it does that's good if it doesn't the new motor is n/g now after we have confirmed that the fan motor does indeed work you must drain the radiator and remove the coolant temperature sensor this acts as the switch to turn on the fan motor when the bimetal elements touch each other inside at the right temperature this completes the circuit and turns on the fan motor reverse removal fill the radiator and let run to check for leaks and that the fan now comes on

please follow this steps and fix it.
A fan failure, or a failure of the fan relay or control circuit is bad news because it can allow the engine to overheat.
Five things may prevent an electric cooling fan from coming on:

• Defective temperature switch or coolant sensor
Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan)
• Failed fan relay
• A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
• Bad fan motor

ELECTRIC COOLING FAN QUICK CHECKS.
One way to quick check the fan circuit is to start the engine and turn on the A/C to max. If the fan runs, the fan motor, relay, fuse and wiring are all okay. But this test doesn't show if the temperature switch or temperature sensor and PCM are energizing the fan when coolant temperatures are high.
To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees. If the fan does not come on, something in the control circuit is defective. Resistance checks should then be made on the temperature sensor or switch, and a voltage check on both sides of the relay (you will probably need a wiring diagram of the fan cooling circuit on your vehicle to identify the relay terminals and wiring connections).
The fan motor itself can be checked by using jumper wires. Unplug the wiring connector on the fan, and use the jumper wires from the battery to route power directly to the fan. If the fan motor is good, the fan should spin at normal speed when supplied with 12 volts. Noisy bearings or a slower than normal speed would indicate a worn motor.

Its either t

• HOME
• REPAIR HELP
• PRODUCT AND HOW TO INFO
• C
• COOLING FAN SWITCH
• TEST

Cooling Fan Switch ABCDEFGHIJKLMNOPQRSTUVWXYZ Inspect/Test/Replace

To find the RADIATOR COOLING FAN MOTOR RELAY, we need additional information about your 1995 Oldsmobile Aurora 4.0L SFI DOHC 8cyl.
Please select one of the following:

• Number one
• Number three
• Number two

The Radiator Cooling Fan Motor Relay is located: Under hood, passenger side, upper firewall, mounted in corner in relay block
When testing a cooling fan switch, first test it with the engine cold, then test it when the engine reaches a specified temperature. Check your vehicle's service manual for more directions.
To check a switch, disconnect the connector at the switch. with an ohmmeter, check for continuity between the terminals of the switch with the switch moved to the on position and to the off position.

To find the RADIATOR COOLING FAN MOTOR RELAY, we need additional information about your 1995 Oldsmobile Aurora 4.0L SFI DOHC 8cyl.
Please select one of the following:

• Number one
• Number three
• Number two

The Radiator Cooling Fan Motor Relay is located: Under hood, passenger side, front side of wheelwell, mounted in relay panel
The continuity through a switch can be checked with an ohmmeter. With the switch open, there should be infinite resistance. With the switch closed, there should be zero resistance. With the switch off, there should be no continuity between the terminals. With the switch on, there should be good continuity between the terminals. If the switch is activated by something mechanical and doesn't complete the circuit when it should, check the adjustment of the switch. (Some switches are not adjustable.) If the adjustment is correct, replace the switch. Another way to check a switch is to simply bypass it with a jumper wire. If the component works when the switch is jumped, a bad switch is indicated.
Voltage drop across switches should also be checked. Ideally, when the switch is closed there should be no voltage drop. Any voltage drop indicates resistance and the switch should be replaced.
he fan motor,the fan switch,or the coolant temp.sensor.

Ok. The way your system is set up,you have a fan switch located in the engine block,usually near the top.That fan swtich sends the voltage to the fan motor or to a fan relay then to the motor.You can jump the fan motor directly to make sure the motor itself is not burned out by unplugging the motor and running a jumper wire from your battery pos terminal to the terminals on the fan motor itself..If you have checked the motor and it does work,then the easiest thing to do is simply replace the fan switch.You should have a Coolant temp switch and a radiator fan switch and possibly and Radiator fan relay.I would try the radiator switch first,then replace the relay.The coolant temp sensor is for the computer and usually doesnt tie into the radiator fan switch.try that and repost.Good luck

Check all fuses first. if the fuses are okay, disconnect the engine cooling fan connector and using jumper wires, connect the fan motor directly to the battery and ground. If the fan still doesn't work, replace it. If the fan does work, its relay may be faulty. Check in the engine compartment fuse box for the cooling fan relays. Try switching the cooling fan relays and see if the engine fan comes on and the a/c condensor fan stops working. If so, the engine cooling fan relay is faulty. If the engine fan still doesn't come on with a good relay, then check the engine temperature switch located at the passenger end of the front cylinder head. It is supposed to switch (have continuity) when the engine temperature reaches 205 deg F. You can remove the switch and put it in a pot of close to boiling water (212 deg F). If it doesn't have continuity at that temperature, it is defective.

You can have a couple things going on. One being a bad temperature sensor. Dont be to surprised many cars have 2 and for one of them its only function is to tell the fan when to turn on. The other is a bad fan motor. Jumper a wire from the battery to the connector and see if it turns on. If it doesn't then you need a new motor.

the cooling fans on your car are comanded on by the engine control module which reads engine temperature from the temperature sensor . when comanded on the engine control module sends a signal to the cooling fan relays . which in turn runs the current to the cooling fans . So you might want to check the cooling fan relays and make sure the fues for the cooling fans are good and the relays .if the cooling fan fuses and relays are good it could be a problem with the fan motors or the engine control module not reading the right temperature in that case it could mean you have a problem with the temperature sensor

If you have not checked it yet, you can do so, around the lower right corner of the fan motor is the electrical connection. Us 2 jumper wires and connect directly to the hot and neg post of the battery, if the fan does not work, replace the fan motor. do this for both sides, this should give you which direction you will need to go. If the motor is good, check the fuses (the one in the engine compartment). the coolant temperature switch, the radiator relay, and lastly the condenser fan relay. I hope this helps you, Good Luck!

check temp sencer wire at bottom of raditor

First question to you is.. Have you checked the wiring or ECU codes?




check the cooling fan switch on the back of the block, unplug the connector and jumper.
2 wires, turn ignition on and fan should come on...

if it does-----replace the cooling fan switch
if it doesnt----- go to the cooling fan relay on the pass side inner fender
panel behind the headlight and check it, besides the fan itself and the fuse, those are the only things in the system.