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Wiring diagram 2008 Ford F350 6.4 litre

Have a 08 f=350 6.4, replaced the coolant fan, but the wiring color codes are different than the old one, now im getting a P0528 fan speed sensor circuit no signal, fan is stuck on high all the time @

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Here's the wiring diagram and testing procedure.

https://ricksfreeautorepairadvice.com/p0538-ford-f350/

Posted on Feb 14, 2020

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6 Suggested Answers

Anonymous

SOURCE:

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Posted on Jan 02, 2017

dustyboner

alex metro

  • 364 Answers

SOURCE: my obd2 is showing me a code p0118 engine coolant temperature circut high input

d220d27.jpg this is the coolant temp sensor, it sends a signal to the engine ECU
---------------------------------------------------------------------------------------------------------------------

d9e2deb.jpg
this is the temp sending unit. it sends a signal to the gauge on the instrument panel.
this is what you need to get to fix your temp gauge.

Posted on Oct 15, 2008

Anonymous

  • 94 Answers

SOURCE: cooling fans on 2001 chevy malibu will not come on unless ac on

the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
good luck

Posted on Jan 28, 2009

Joe Blow

  • 257 Answers

SOURCE: Code P2185 2005 VW Jetta 2.5 5cyl

There are two coolant temp sensors. One by the oil filler tube and one near the bottom radiator hose near the radiator.
When you flushed the coolant did you replace with VW rated G12 coloant? Very Important! - You can't use over the counter coolant - it'll cause sludge in your system. You have to use G12...

Hope this helps!
Please rate/vote! Thanx!

Posted on Jul 18, 2009

Anonymous

  • 169 Answers

SOURCE: fan speed high, idles eratically

theses are known for bad fan clutch also needs poss pcm update

Posted on Aug 29, 2009

duane_wong

Duane Wong

  • 6826 Answers

SOURCE: 2001 chevy cavalier,cooling fan wont come on,relay

could be a p.c.m. if you can't read codes.

Engine light if giving a cooling circuit problem, senses that the fan won't come on. Trac goes on when the abs wheel speed sensors don't sense right speed (open or closed circiuit). Could be a fusible link near starter.

a/c clicking on and off, could mean charge is insufficient or too much r134a in the system.

Those are my thoughts on it.

Posted on Jul 22, 2010

Testimonial: "great info,code po480,could something have got wet when car overheated?"

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Need a wiring diagram of the 2 wires from the temp sending unit that controls the temp gauge and cooling fans on a 99 grand am gt. Need to see where they go They disappear behind the engine


The PCM regulates voltage to the coolant fan relays, which operate the fans. Refer to Engine Controls.

Engine Cooling Fan Description - Electric
The electric cooling fans are used to lower the temperature of the engine coolant flowing through the radiator. They are also used to cool the refrigerant (R-134a) flowing through the A/C condenser.
Operation
The electric cooling fan operates when the engine cooling temperature exceeds a certain value. The cooling fan on this engine is controlled by the PCM. The cooling fan has one speed. The PCM turns the cooling fan ON by grounding the coil of the cooling fan relay when certain conditions are met. When the A/C is requested, the cooling fan will also be turned ON.
Power for the cooling fan motors are supplied through Cool Fan #1 and Cool Fan #2 relays. The cooling fan relays are energized when current flows from the fuses in the Cell 23: Cooling Fan Controls , and through the relay coils to ground through the PCM. The Low Speed fans control circuit is grounded for low speed fans operation. During low speed fans operation, both fans run at a slow speed. The High Speed fans control circuit is grounded for high speed operation. During high speed fans operation, both fans run at high speed.
Important: When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. It is important to perform Powertrain On Board Diagnostic (OBD) System Check prior to diagnosing the engine cooling fans.
If a problem that involves the low speed cooling fan relay control circuit exists, DTC P0480 should set. If the problem affects the high speed cooling fan relay control circuit, DTC P0481 should set. A problem with the ECT sensor should set DTC P0117, P0118, P1114, or P1115. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Cooling Fan Diagnosis tables. The Cooling Fan Diagnosis tables should be used to diagnose the PCM controlled cooling fans only, if a DTC has not set.

The engine coolant temperature (ECT) sensor (3) is a thermistor, a resistor which changes value based on temperature, mounted in the engine coolant stream. Low coolant temperature produces a high resistance (100,000 ohms at -40°C) (-40°F), while high temperature causes low resistance (70 ohms at 130°C) (266°F).
The PCM supplies a 5 volt signal to the ECT sensor through a resistor in the PCM and monitors the terminal voltage. Since this forms a series circuit to ground through the ECT sensor, high sensor resistance (low temperature) will result in high PCM terminal voltage. When the resistance of the ECT sensor is low (high temperature), the terminal voltage will be drawn lower. This terminal voltage indicates engine coolant temperature to the PCM.
A hard fault in the ECT sensor circuit should set either a DTC P0117 or P0118. Remember, these DTCs indicate a malfunction in the engine coolant temperature circuit, so proper use of the DTC table may lead to either repairing a wiring problem or replacing the sensor, to properly repair a problem.

The engine coolant sensor is an input to the PCM , Two wire's both go to the PCM .An the PCM turns on the cooling fans !

DTC P0480 Cooling Fan Relay 1 Control Circuit
DTC P0481Cooling Fan Relay 2 Control Circuit
The Body Control Module (BCM) request the cooling fans. The BCM sends a Class 2 message to the PCM in order to enable the fans based on various inputs. Thebattery voltage travels to all three cooling fan relay coils. The PCM enables cooling fan relay #1 by providing the ground path. The PCM enables cooling fan relays #2 and mode control together by providing a ground path. The left and right cooling fans are connected in series. This will enable both fans on low speed when the fan #1 relay is energized. When all three fan relays are energized, both fans will operate at high speed. The high speed is possible because the fan relays are wired in a parallel circuit. When the PCM detects that certain DTCs are set, the PCM will enable the cooling fans.
The PCM will enable the engine cooling fans when certain Diagnostic Trouble Codes are set.

Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.
1
Did you perform the Instrument Cluster System Check?
--
Go to Step 2
Go to Instrument Cluster System Check
2
Turn the ignition switch to the ON position.
With the scan tool select Instrument Panel Cluster, Special Functions, Instrument Panel Cluster (IPC) gauges.
Perform the Coolant Gauge Sweep Test.
Does the coolant temperature gauge complete a full sweep when commanded?
--
Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls
Go to Step 3
3
Replace the instrument cluster. Refer to Instrument Cluster Replacement .
Did you complete the repair?
--
Go to Instrument Cluster System Check
--

Your best bet would be to take your vehicle to a qualified repair shop that knows how the system works . An has the tools to diagnose the problem .

Nov 13, 2016 | 1999 Pontiac Grand Am GT

1 Answer

Where is radiator fan switch on 1998 olds intrigue


You have relays for the cooling fans. Did you check applicable fuses and voltage on fuse circuits? Any applicable trouble codes?
Check the coolant temp sensor. Don't replace anything unless your testing points in that direction.
The low speed fan comes on about 223 degrees F, hi speed about 230 degrees f.
If you turn on the ac, the fan/s may run? On some makes and models, if you unplug the coolant temp sensor, the fan/s may run?

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Oct 18, 2016 | Cars & Trucks

3 Answers

Can either of these codes cause my 1999 Oldsmobile bravada SUV to over heat: P0442 ornP1361 or P0117??


code p 0442 refers to EVAP system so that is unlikely
check the fan operation and if you have a viscous fan hub ( fan clutch ) replace it
if you have electric fans , check coolant temperature sensor for operation , fuses , relay and fans
overheating is from low coolant levels , head gaskets/cracked heads, blocked radiator cores , fins flaking off core tubes, incorrect timing, blocked exhaust( cat converter)problem thermostat, over loading /over speeding, overdrive not engaging
if you over heating is predominately at lights , slow moving traffic or high engine rpms with low speed --check the fan operation and if it is viscous fan hub driven --replace the hub or if electric fans have that circuit checked out

Sep 07, 2016 | 1999 Oldsmobile Bravada

1 Answer

2000 radiator fan test, is there any way to test the fan before o get a new one


check cooling fan fuse or fuse link.it all is good. fan relay or engine coolant temperature sensor.could have ECM FAULT it controls coolant fan relay and coolant fan.code scan for ECM FAULT YOU WILL SEE CHECK ENGINE FLASH IF PROBLEM IN THE ECM.but check cooling fan hot wire it using jumper wires to battery.if fan okay replace engine coolant temperature sensor.

Feb 20, 2013 | 1999 Volvo S80

1 Answer

1998 ford escort thermostat sensors.. do they control the fan? or the opening of the thermostat?


There are probably Experts with more experience on this engine but I will try to help. You need to fix the broken wire or replace that sensor. That being said, there are some Ford engines which have 2 water sensors with one operating the coolant fan and the second for the dash gauge or trouble light. The electric coolant fan can also have 2 speeds.

For lack of water circulation, this is a water issue. The most probable cause is a stuck thermostat or air lock. I remember someone writing into Fixya about a plastic impeller falling off the water pump and it might be a good idea to check out a new water pump or pull your old water pump from the old engine and see if the impeller is plastic.

Finally, were there any issues with the replacement motor? It is possible to have bad head gaskets or clogged water passages. This would be hard to check. Having a motor of KNOWN quality can protect you from problems like this.

Jul 21, 2017 | 1998 Ford Escort

1 Answer

Cont question on impala ck engine


Haven't yet checked the coolant temp sensor ? Does the vehicle shift good , engine run good ? If yes the coolant sensor isn't any problem . Is this your only problem ,The 25 amp mini fuse that keeps blowing is labled as fan cont #1 > You have a direct short to ground on the circuit that fues powers up . Do yo know how to find a short ? Videos on youtube for checking for shorts . It's probably a wiring problem . Insulation rubbed through , touching metal on the vehicle somewhere . Your vehicle cooling fans have two speeds low an high , that's it . Relay Driven Dual Cooling Fan Diagnostics

Mar 08, 2017 | Cars & Trucks

2 Answers

Repaired wires on fan clutch and the code p0526 is pending


CODE PO526 - FAN SPEED SENSOR. POSSIBLE CAUSE WIRING POOR CONNECTION BAD SPEED SENSOR.

Dec 29, 2010 | 2004 Chevrolet TrailBlazer

2 Answers

Code 1481 and1271


your code P1481 is for the cooling fan speed the problem is often the wires and connector that go to that unit ... removing and replugging the connector sometimes fixes it ... also check the fan clutch and fan (not as often the trouble) .. there is a techniical bulliten out for this trouble .. (tsb050605012) .. sometimes the wire harness is replaced for the fan ...

your trouble code p1271 is associated with the accelerator pedal position sensor (APP) (right above the gas pedal) .. again check the wiring and connector going to the APP .. if the APP turns out to be bad then its not hard to change and requires no computer changes ... when you get an APP alarm then your car may go into a "reduced speed mode" ...
here is a list of the service bullitins on your trailblazer....

http://www.carcomplaints.com/Chevrolet/Trailblazer/2002/tsbs.shtml

Apr 15, 2010 | 2002 Chevrolet TrailBlazer

3 Answers

Replaced complete fan assembly Two sensors. Fan


is the temp gauge working? sounds like coolant temp sending unit... or a possible engine coolant temp sensor or ect sensor.

Aug 05, 2009 | 1996 Ford Mustang

3 Answers

Van chevrolet venture 2000


Fifteen minutes! you have bigger problems than only the fans the fans are controlled by a thermo switch that is heated by the coolant, If you have no coolant the sensor cannot activate But fifteen minutes seems like you may have a headgasket problem and steam cannot heat the coolant sensor.OperationNotesThe electric cooling fan operates when the engine cooling temperature exceeds a certain value. The cooling fan on this engine is controlled by the Powertrain Control Module (PCM) . The PCM turns the cooling fan ON by grounding the coil of the cooling fan relays when certain conditions are met. When the A/C is requested, the cooling fan will also be turned ON.

Power for the cooling fan motors are supplied through Maxifuses(R). The cooling fan relays are energized when current flows from the fuses in the Underhood Accessory Wiring Junction Block, and through the relay coils to ground through the PCM. The Coolant Fan 1 Relay Control Circuit is grounded for low speed fans operation. During low speed fans operation, both fans run at a slow speed. The Coolant Fan 1 Relay Control Circuit is grounded for high speed operation. During high speed fans operation, both fans run at high speed.

IMPORTANT: When certain Diagnostic Trouble Codes (DTCs) are present, the PCM may command the cooling fans to run all the time. Perform the A Powertrain On Board Diagnostic (OBD) System Check prior to diagnosing the engine cooling fans.

For more information regarding the Charging System, refer to Charging System Description , and Charging System Circuit Description in Starting and Charging.

If a problem that involves the low speed cooling fan relay control circuit exists, DTC P0480 Cooling Fan Relay 1 Control Circuit should set. If the problem affects the high speed cooling fan relay control circuit, DTC P0481 Cooling Fan Relay 2 Control Circuit should set. A problem with the ECT sensor should set DTC P0117 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage, DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage, DTC P1114 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage, DTC P1115 Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage. Any of these DTCs will affect cooling fan operation and should be diagnosed before using the Electric Cooling Fan Diagnosis.

For more information regarding the Cooling System refer to Engine Cooling Fan Description - Electric, and Cooling System Description in Cooling System.


Here is the electrical schematic and how it all is suppose to work,
If you need any further help please contact me Thank you,Randy If you find this information helpful please give me a good rating

www.aceautomotive1.com

Aug 16, 2008 | 2000 Chevrolet Venture

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