The fan relay is located
on the driver side firewall
. It is at the very end where the firewall and left front fender meet. There are two relays in that location, one is the fuel pump relay and one is the fan relay.
Where is the fan relay located?
The cooling fan relay is normally located in either
the underhood fuse and relay center
or mounted to the electric fan assembly behind the radiator.
How do I know if my fan relay is bad?
- The engine runs hot or overheats. …
- The cooling fans don’t work. …
- The cooling fans keep running. …
- Warning lights. …
- Poor air conditioning performance. …
- Swapping Relays. …
- Measuring the Relay Coil’s Resistance. …
- Listening for Noises.
How do you check a fan relay?
- Look at the markings on top or side of the relay case and locate the two control circuit terminals, which connect to the relay’s coil, and the two power circuit terminals, which let electrical current pass to the fan. …
- Connect the leads of an ohmmeter to the power terminals on the relay.
What is a fan relay?
A cooling fan relay is
used on vehicles that have an electrical fan to cool the engine
. The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module (ECM) or a thermostatically controlled sensor.
Should radiator fan turn on when AC is on?
Both radiator fans should always run when the AC compressor is engaged. 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
.
Why does my radiator fan not turn on?
If the fan doesn’t come on,
you need to look for a blown fuse or breaker
. In older cars, you might have a fusible link – this is wire within an insulated block of rubber. Try to grab the end and stretch it. If the wire stretches, the wire link could be broken and you’ll need to replace it.
Can AutoZone test a relay?
A relay can be checked with a jump cable
, a voltimeter, an ohmimeter or a test light. If the terminals are accessible and the relay is not controlled by a computer, the fastest method will be a jump cable and a test light.
How do you check a relay?
- Locate the relay you need to test. …
- The quickest and easiest way to test a relay is to swap it out with a known good replacement. …
- Grab a multimeter and set it to Ohms. …
- Leave the multimeter on ohms or continuity. …
- Energize the electromagnet coil with a 9-12V battery across the pins.
How much does a fan relay cost?
To get your cooling fan relay replaced, you will pay, on average,
$80-$160
, depending on the type of car you have and the mechanic’s fees. The labor should cost around $70, while parts should run you $10-$50.
What tells the cooling fan to come on?
The engine temperature should trigger the fan to turn on
. It will also turn the fan off once the engine has cooled to under 200 degrees. You may have heard of a part called the radiator fan switch or temperature fan switch. This is linked to a thermostat and works much like your home’s HVAC system.
Why is my engine fan not working?
Defective temperature switch
, coolant sensor or other sensor. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
What sensor controls the radiator fan?
On most modern cars, the cooling fan is controlled by
the Engine Control Unit (ECU)
which gets a signal from the coolant temperature sensor.
Do I need a relay for a radiator fan?
Most parts stores carry toggle switches and/or push-pull switches that will handle anywhere from
30-60 amps
, so that would work. If you’re using one of those thermostatically-controlled deals (or a low amp rated manual switch) you should use a relay.
Why does the radiator fan stay on?
Cooling fans stay on at all times
The cooling fan relay essentially
functions as the switch for the engine’s cooling fans
, and is therefore an important electrical component of the vehicle’s cooling system. … They will be able to look over your vehicle and replace your cooling fan relay if necessary.
