Question about 1996 Buick Roadmaster

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Engine fan not comming on is there a fan switch under hood

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Theres a coolant temp sensor that controls the fan, it will turn fan on when the temp is reached, its screwed into the intake near the thermostat housing.

Posted on Nov 12, 2010

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1 Answer

The primary radiator fan does not come on.


Check Maxi fuse #3 60 amp in the under hood electrical center #1 .This is power for the #1 cooling fan . Also check the #1 fan control relay in the same under hood electrical center .
These vehicles use 2 360 mm (14.2 in) cooling fans to aid air flow through the radiator. Electric motors drive the cooling fans. These motors are attached to the radiator. Motor size varies with each engine option.
A coolant temperature switch activates the fan motors. This switch regulates voltage to the cooling fan relay. This switch operates the fan whenever the engine coolant temperature exceeds 110°C (230°F). For location and diagnosis, refer to Electrical Diagnosis. A transducer can also activate the circuit, depending on the A/C compressor head pressure going to the condenser.
The engine cooling fan relays provide the high current required for the cooling fan motors using a low current signal coming from the Powertrain Control Module (PCM). This signal is a function of various inputs.
Refer to Electrical Diagnosis for further information and diagnosis of the cooling fan relay.
Electrical Center #1, Underhood (U/H)
RH side of the engine compartment, forward of the strut tower

Jun 08, 2016 | 1996 Pontiac Grand Prix

1 Answer

Missing the owners manual for 1986 accord need to locate which fuse is for cooling fan under dash. have already checked ones under hood


ooh that is and oldie....

the heater blower fan is dead, ?
this car is wired (im looking in alldata dot com now)
gets 12v power from the IGNITION at all times. so there is no
blower fuse. (if the fan shorts, the engine fuse blows. and engine dies.
the current passes thru motor, and then to the dash speed switch
and on level 4 there is no resistor, so must run, here, (does it?)
then the switch is grounded.
so if engine runs.
and speed 4 fails, it can only be.
1: bad ground to switch.
2:bad wires.
3 :bad switch,
4: bad fan, (hot wire fan does it work,. yes, good its good.

id put my DMM across the fan , turn it on, and if 12vdc is across said fan, and it dont blow, its a bad fan.
if the low side of fan is not 0v, all times. the ground is bad.
if the 12v never reaches the fan, then the path on that side is bad.

Oct 24, 2013 | Honda Accord Cars & Trucks

1 Answer

Where is the engine cooling fan switch on a 2002 cavliar


If your engine cooling fan motor is not working first check the maxi fuse
under the hood in the fuse box. If the fuse is burnt out then more that likely the cooling fan motor is drawing to much and will also need to be replaced.

Mar 15, 2013 | 2002 Chevrolet Cavalier Coupe

2 Answers

I got 98 GMC Envoy there no power to A/C fan control, 4x4 switch, temperature gauge and fuse gauge,I'm try to sawp the fuse and relay under the hood and check under dash fusebox alls fuse ok but


if there have some problem on your A/C, may be the Multi-Diag Access J2534 can help you. It has the function for air condition, such as Diagnosis of cooling electronic,
Reading settings cooling circuit,Test servo actuators
http://www.allobd2.com/wholesale/Multi-Di@g-Access-J2534-Pass-Thru-OBD2-Device.html

Oct 08, 2012 | GMC Envoy Cars & Trucks

1 Answer

My fans under the hood stop working how could i fix it does it run bye a fuse. 1998


Yes , if what you mean is the radiator fan then it is linked with a thermal switch- a thermister with circuit- to activate when the engine is hot to switch over the fan .
This circuit /fan is through a fuse and relay contactor which is in the engine room and must be checked in the box.

Jul 26, 2011 | Buick Century Cars & Trucks

3 Answers

Where is the cooling fan relay located on a 2002 Toyota Solara?


FUSE BOX UNDER HOOD DRIVERSIDE BY THE FIREWALL(BACK OF ENGINE BOTTOM OF WINDOW UNDER THE HOOD

Jun 16, 2011 | Toyota Solara Cars & Trucks

1 Answer

My cooling fans are not coming on.the fuse is good.where is the relay switch located for cooling fan? i think it might be bad.thanks.


The relay for your cooling fan is located Under hood, passenger side, front side of wheel well, mounted in relay panel. I would also recommend testing or inspecting the coolant temperature sensor as well. it is located Under hood, passenger side, upper engine area, above water pump, mounted in intake manifold

Please rate and have a great day:)

May 16, 2009 | 1996 Dodge Grand Caravan

1 Answer

Where is and what does the cooling system fan relay look like? i have determined that the switch that turns on the fan that cools the radiator is bad but can't find it.


The fan temperature sensor,(Fan switch), is activated by the cooling systems coolant. Activated by it's temperature.
It's located under the hood, passenger side, upper engine area, below the alternator, and mounted in the intake manifold.
My money, is on the fan temperature sensor being bad.

The fan switch will usually be cylindrical shaped, the bottom is made of brass, and the top has a black insulator material, with a rubber type plug on top. The plug will have two wires coming out, going into the engine wiring harness. One wire is Black, one wire is Yellow.

The fan relay is located in a relay panel. I can't tell you at present, whether it's in a black plastic box, that you remove a cover to access it, or the relay is exposed. If it's in a plastic box, under the cover it should state what each relay is for, and where they are located inside the box.

The relay panel is under the hood, on the passenger side, front engine area, on the passenger side of the radiator.


May 09, 2009 | 1992 Oldsmobile Cutlass Ciera

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