Question about 1995 Buick LeSabre

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I think it is electric the motor is pulsing heater not working coolant fan not working.

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  • hunter_roger Nov 11, 2010

    I said the heater was not working also. and the motor has a pulse

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Need more details, engine size?,what motor pulsing?,commas in the sentances,blower motor working..just no heat or no blower motor operation?? is the coolant and engine oil full??

Posted on Nov 11, 2010

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There is a relay under the dash on the passenger side that is more than likely the problem. Sometimes you can bump the dash next to the glove box and the fan will start working. The relay is between the glove box and the center console.

Posted on Nov 11, 2010

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1 Answer

MY BLOWER MOTOR WAS WORKING & THEN ALL OF A SUDDEN IT STOPPED. WHY? A 2000 PONTIAC BONNEVILLE


Blower motor control module would be a good guess , but is still just a guess . Testing the electrical circuit would need to be done to know for sure . Do you know how to test electronic's , automotive electrical circuits ?

HVAC Blower Controls Circuit Description
The blower motor is controlled by the blower control module. The blower control module receives the requested blower speed from the heater and A/C control in the form of a 5 volt pulse modulated reference signal. When low speed is requested by the heater and A/C control, the pulse width is reduced. When high blower speed is requested, the pulse width is increased. An open circuit, short to ground or short to battery on the blower speed input circuit of the blower control module will disrupt the pulse modulated reference signal. If the blower control module does not receive the pulse modulated signal, the blower motor will not operate. The blower control module receives power from the rear fuse block. The blower control module also provides a ground for the blower motor. A separate blower motor flange ground is used to limit radio frequency interference.

HVAC Blower Motor Circuit

Mar 24, 2017 | Pontiac Cars & Trucks

1 Answer

89 cadillac eldorado, engine cooling fan and interior heater fans intermittently do not turn on when they should, they will reach 107Celius over heat light does not come on and coolant is circulating as it...


hi,
some vehicles have a synchronised twin electric fan system that operates only when the AC is turned on, can you manually turn off the AC and see if that changes what you have just described.
If not then the climate air ( AC ) sensor may be faulty.

Oct 30, 2013 | Cars & Trucks

1 Answer

How to replace heater fan motor


first turn off radio to keep from locking it out then remove the negative battery cable.now to remove blower motor on blazer go under the hood remove pcm computer from the top of the coolant recovery tank,then remove the coolant recovery tank your heater blower motor behind the housing remove blower motor electrical connectors then remove blower motor housing bolts then you right at the blower motor.

Jan 04, 2012 | 2000 Chevrolet Blazer

2 Answers

I have a 2001 Jeep Grand Cheokee and it is overheating when I idol and when I idol the heater is not blowing cold air. It will blow warm air while I am driving down the road. What do you think could be...


Check the cooling fan motor and of course the fluid level. If the temp is changing thru the heater it could just be low on coolant , leaking from ? Two wheel drive have an elecrtic cooling fan only, make sure its spinning up when temp is 3/4. If not its probably the fan motor. Can be checked with a test light .

Feb 11, 2011 | 2001 Jeep Grand Cherokee

1 Answer

How to remove the heater blower fan on 92 chevy 1500


Heater Core - REMOVAL & INSTALLATION
1991-92 R/V and 1991-98 C/K Series
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the instrument panel glove compartment.
  4. Tag and unplug all electrical leads as necessary.
  5. Remove the center air distribution duct from the floor.
  6. If necessary, remove the ECM and mounting tray.
  7. Remove the hinge pillar trim panels.
  8. Remove the blower motor cover and then remove the motor.
  9. Remove the steering wheel and tilt back the instrument panel slightly.
  10. Remove the coolant overflow tank. Disengage the heater hoses at the core connections.
  11. Unfasten the attaching screws and nut and then remove the heater case.
  12. Remove the seven screws and lift off the heater case cover.
  13. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case.
To install:
  1. Install the heater core in the case.
  2. Install the heater case bottom plate. Make sure there is a good seal.
  3. Install the heater case into the truck. Tighten the 4 lower screws to 17 inch lbs. (2 Nm); the upper screw to 97 inch lbs. (11 Nm); and the nuts to 25 inch lbs. (2.8 Nm).
  4. Connect the heater hoses at the core tubes.
  5. Install the coolant overflow tank.
  6. Install the instrument panel and the steering wheel.
  7. Install the blower motor and cover.
  8. Install the trim panels and if removed, the ECM. Install the air distribution duct and reconnect all electrical leads.
  9. Install the glove compartment. Fill the cooling system and connect the battery cable.


Blower Motor - REMOVAL & INSTALLATION
1992-98 Models
(see Figure 4)
  1. Disconnect the negative battery cable.
  2. Remove the right rear quarter panel trim.
  3. Disconnect the electrical lead at the fan.
  4. Remove the screws and if equipped, the cooling tube.
  5. If necessary, remove the fan retaining nut and lift out the blower fan.
  6. Remove the blower motor.
To install:
  1. Install the blower motor and then position the fan.
  2. Install the retaining nut and then tighten the mounting screws to 12 inch lbs. (2 Nm).
  3. If removed, install the cooling tube.
  4. Connect the electrical lead. Install the quarter panel trim cover.
  5. Connect the battery cable.
zjlimited_45.jpg

Fig. 4: Auxiliary heating and A/C system





Hope this helps (remember to rate this answer).

Nov 09, 2010 | 1992 Chevrolet C1500

2 Answers

V6 camry engine overheating what are possible causes


Make sure the reservoir coolant tank is at 'full'. Start the car from cold and observe. After a couple of minutes when the engine has begun to drop in revs ( the coolant temperature sensor should tell the ECU to begin to shorten the injection cycle as the engine warms) the top of the engine and the coolant passage to the thermostat housing should become warm to the touch. When hot the top rubber hose to the radiator should become warm and then hot as coolant begins to circulate. If the top hose fails to get hot at any time then the thermostat is at fault. If you have electrically driven radiator fans these should now come on. If they fail to come an at all you need to check the coolant temperature sensor, the electrical motor fuses and the motor relay. Lastly check the motor itself (just run a 12v supply to it directly). As the ar continues to idle, with the fans running, the bottom return hose from the radiator to engine should also become warm. If the bottom hose fails to become warm this points to circulation problems. Either the radiator had become clogged with rust sludge and needs an extensive flushing out with a high pressure hose or the pump is not functioning as it should. Quickly check that the interior heater works by asking for 'full heat with fan on full'. If the interior heater works this indicates that the main coolant pump is probably OK. To check the thermostat more thoroughly, remove it from the car and drop it in a pan of near boiling water; the 'stat should pop open. As the pan cools, at 88 degree centigrade or so, the 'stat should pop closed. Failure to observe this tells you the 'stat is a dead and needs to be renewed.

Sep 02, 2010 | 1999 Toyota Camry

2 Answers

My 1991 mazda mx-6 resevoir coolant tank boils and spills out .


your electric cooling fan is not switching on that is either 1. you fan is bad which you can test jumping a hot wire to the pos side of the fan if it works then exclude it. 2. your fan works on a ground system there is a coolant fan switch in the head that can cause no fans, and the last 3. nfan relay or fuse bad

Aug 24, 2009 | Subaru Forester Cars & Trucks

1 Answer

My 2001 lincoin ls gauge goes up to the h and then come back down


you probably have air trapped in the system. Have dealer or radiator shop bleed system.

I assume your cooling fan is working.

what engine v6 or v8?

SECTION 303-03: Engine Cooling 2001 Lincoln LS Workshop Manual
DESCRIPTION AND OPERATION Engine Cooling The cooling system components include the:
  • block heater (optional)
  • cylinder head temperature sensor
  • fan blade, fan motor and fan shroud assembly
  • radiator
  • pressure relief cap
  • degas bottle
  • radiator draincock
  • water pump
  • oil cooler (optional)
  • water thermostat
The water thermostat:
  • controls the engine coolant temperature.
  • allows quicker engine warm-up.
The degas bottle:
  • provides a location for system fill.
  • contains coolant expansion and system pressurization.
  • provides air separation during operation.
  • replenishes the engine coolant to the system.
The fan blade draws air through the radiator to help cool the engine coolant.
The fan motor:
  • operates only when the engine is running.
  • will not operate when the engine is off.
The engine coolant flows:
  • from the lower radiator hose to the water pump.
  • from the water pump to the engine block and the cylinder heads.
A closed water thermostat returns the engine coolant to the water pump. An open water thermostat allows the engine coolant to flow to the radiator.
Unsatisfactory coolant materials:
  • Alcohol-type antifreeze does not provide adequate water pump lubrication.
    • has lower boiling point
    • reduced antifreeze protection
  • Alkaline brine solutions will cause serious engine cooling system damage.
The cylinder head temperature sensor provides a signal to the temperature gauge.
  • will invoke failsafe cooling.
The optional block heater:
  • electrical heating element is installed in the block cooling jacket.
    • uses a standard 110V (220V in Europe) electrical supply
  • keeps the engine coolant warm during cold weather.
The auxiliary water pump (3.9L only):
  • provides heater coolant flow boost.
  • has a secondary function of providing engine-off cooling.

May 01, 2009 | 2001 Lincoln LS

1 Answer

2001 mercury marquis no fan for heater. climate controlsystem on


Ok you have a bad blower speed controller if you have power to the motor.
It is located under the hood in the heater housing just below the heater core coolant hoses.
You will have to drain coolant.
Remove the nuts holding the Vapor Management valve and set it aside.
Remove coolant hoses to heater core.
Disconnect electrical connector to the blower speed controller,remove screws,pull it out of heater housing.

Feb 16, 2009 | 2001 Mercury Grand Marquis

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