Question about 1999 Cadillac Eldorado

2 Answers

1999 Eldorado TC The fan for A/C will not operate at high speed

Posted by on

  • 1 more comment 
  • davidlroyer May 18, 2009

    The blower does not run at higher speed. Where is the resistor ?

  • davidlroyer May 18, 2009

    Where is the fuse?

  • davidlroyer May 19, 2009

    I said that the blower does "not" run at higher speed. Still dont know where the fuse is.

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Cadillac Master
  • 76,164 Answers

The blower fan only working on high is c aused by the blower speed control module being defective, the blower motor speed control module is located right next to the blower motor.

Posted on May 19, 2009

  • yadayada
    yadayada May 19, 2009

    I wanted to add that if te fuse was blown the blower would not work on any speed, the control module once again is the most likely issue here. it is under hood, passenger side, firewall, in heater fan motor case, 4 or 5 wires,mounts from the top of black plastic heater case. Price around $160.00

×

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 355 Answers

Do You mean air doesnt blow cold or fan doesnt blow strong.If you mean it doesnt blow cold that means you need to have a/c recharged.The reason it gets cold after being on the road for a while is because compressor takes time to cool freon when it is very low...


try to Replace the blower resistor.

Posted on May 17, 2009

  • Rohit  Asthana
    Rohit Asthana May 18, 2009

    check the fuse, if good then check the
    thermoswitch in the radiator (it's about an inch and a half in
    diameter located on the lower part of the radiator with two wires )
    by disconnecting the wires and touching them together (again, with
    engine hot...at least 190 degrees) if the fan comes on, you have a
    bad switch. If not connect a 10 gauge jumper wire from the battery to
    the fan itself...











    With power direct from the battery (and
    a ground wire, if necessary) fan should run... if not replace the fan
    assembly... if it does run then you have a bad cooling fan relay... Hope this helps...:-)

×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Fan is not working on 2001 Chevy Silverado 2500 truck radiator fan motor?


The engine cooling fan system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel configuration that allows the powertrain control module (PCM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block.
During low speed operation, the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan s/p relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the PCM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the PCM supplies a ground path for the high speed fan relay and the cooling fan s/p relay through the high speed cooling fan relay control circuit. This energizes the cooling fan s/p relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time the high speed fan relay coil is energized closing the relay contacts and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have there own ground path. The result is a parallel circuit with both fans running at high speed.
Your best bet would be to take your vehicle to a qualified repair shop !
Relay Driven Dual Cooling Fan Diagnostics

Aug 19, 2016 | 2001 Chevrolet Silverado 2500

1 Answer

I have a 1999 buick Lasebra the heat or fan is not working what could it be


Well it could be any one of a few things ! There are two blower motor relays , two fuse's an the blower motor resistor, but wouldn't think that is the problem unless you have high speed blower operation ! But then again don't know if we are even talking about the same fan ? heater fan not cooling fan ?

Feb 20, 2015 | Buick Cars & Trucks

1 Answer

At what temp. does the engine cooling fans come on.


Not sure about a 93, but usually the low fans come on at 190 to 210 degrees Fahrenheit, high speed comes on at 225 degrees. High speed comes on automatucally with the A/C being used.

Dec 14, 2014 | 1993 Cadillac Eldorado

1 Answer

Fan only works high speed. For AC compressor runs but no fan other than when switched to high speed at which time the fan runs at high speed but AC switches off.


I have the same problem on my 1999 Jetta have you gotten any responces yet if you do please email me the solution rohintz@gmail.com Thank you Rick

Jun 13, 2011 | 1999 Volkswagen Jetta

1 Answer

Heater/AC Fan runs continously on High speed until disconnected


your AC controller/computer is bad i owned many caddys and some have up to 3 AC computers most have 2 the one that is the fan speed controller id shot!! and needs to be replaced

Jan 21, 2010 | 1996 Cadillac Eldorado

1 Answer

How to fix 1999 lincoln TC heater/AC fan speed. Speed is intermittent or not blowing at all. Fan sometimes blows at full speed then may start to turn on and off. Sometimes it does not blow at all.


You have a problem with the resistors on your blower motor. 95% of AC/Heater blower motors are located under the glove box in the passanger foot well. When you remove the motor you should see a resistor plate. Resistors are not servicable and will need to be replaced. This is a relatively cheap part, that you can replace yourself if your handy, if not take it to your local tech.

Nov 13, 2009 | 1999 Lincoln Town Car

1 Answer

Where is the blower fan relay for a 1995 cadillac eldorado


UNDER THE RADIATOR 3 OF THEM 1 FOR EACH FAN AND ONE FOR HIGH SPEED

Jul 04, 2009 | 1995 Cadillac Eldorado

1 Answer

I'm trying to find out how many cooling fan relays are in a 1999 Ford Taurus SE with the 3.0L Vulcan OHV engine. This model year has done away with the CCRM (Constant Control Relay Module), so the relays...


fuse #9 protects the 2 cooling fan relays.

It looks like the hgh speed cooling fan realy is in a thin box mounted sideways between the battery and fender.

It has high speed relay, autolamp relay, autolamp headlamp relay, horn relay, washer motor relay, wiper hi/lo relay, wiper park relay.

Section 03-03: Engine Cooling 1999 Taurus, Sable Workshop Manual
DESCRIPTION AND OPERATION Electrical System NOTE: With A/C ON, the cooling fan motors will run continuously. Cooling fan motors will not cycle ON and OFF with A/C clutch (2884) .

NOTE: An exception to this is when vehicle speed is over 61 km/h (38 mph) and coolant temperature is below 100°C (212°F), and A/C head pressure is below 1.71 MPA (250 psi). The cooling fan motors will then automatically shut off.

The cooling fan motors are mounted within a fan shroud (8146) behind the radiator (8005) .

Engine Cooling Fan Control CCRM Applications The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc) to determine engine cooling fan needs. The PCM controls the fan operation through the Fan Control (FC) output (single speed fan applications) or the Low Fan Control (LFC) and High Fan Control (HFC) outputs as shown in Table 2. Although the fan control (FC), low speed fan control and high speed fan control relays are normally open relays, the FC/LFC circuit is wired through a voltage inverter inside the CCRM. The voltage inverter ensures that the PCM must turn on (ground) the FC/LFC output to turn the fan off. This is done so the cooling fan will operate in the event of an open FC/LFC circuit.

Stand-Alone Fan Control Relay Applications The PCM monitors certain parameters (such as engine coolant temperature, vehicle speed, A/C on/off status, A/C pressure, etc) to determine engine cooling fan needs. The PCM determines engine cooling fan control requirements and controls the fan operation through the Low Fan Control (LFC) and High Fan Control (HFC) outputs (Table 3).

Jun 29, 2009 | 1999 Ford Taurus

1 Answer

99 suburban blower fan runs on high only


you need a new blower resistor it is located next to blower motor under dash

Dec 08, 2008 | 1999 Chevrolet Suburban

Not finding what you are looking for?
1999 Cadillac Eldorado Logo

Related Topics:

133 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8273 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...