Question about Oldsmobile 88

2 Answers

Cooling fan does not come on. fan is good, car was in a minor accident, fuse is good. where is relay?

Posted by on

  • billnaser Sep 08, 2009

    Thanks for your reply but everything on the car works perfect except cooling fans. I Checked the fuse on drivers side but is one located on the passenger side.



    Do you have a way to get a wiring diagram manuel?

  • billnaser Sep 08, 2009

    We have a 1999 oldsmobile. Cooling fans stopped working after minor accident. everything else works perfectly. hot wired fan and fan works, fuse is good, possible relay problem and cannot find relay. It is not in fuse box under drivers side dash. Can anyone tell me where the relay is or provide a diagram for this vehicle?

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Oldsmobile Master
  • 2,200 Answers

Hi

Are you sure that it is not the temp sender that is at fault?

Reason I say this is to my knowledge there are two relays numbered 6 and 7 which are located in a box under the hood. These control a low and high speed output to the fan.

As it seems that you have no activation of the fan at all the temp sender sensor/switch may be at fault. This is usually located in the radiator and on your year Olds 88 looks like this;cooling fan does not come - 74a62ad.jpg


First I would advise that you check that the wiring and connections to this sensor are intact.

Second look under the hood for the location of the box containing these relays. Unfortunately Olds kept changing the location of these relays throughout the 90's so I cannot be more specific than that in this instance.

Hope this helps. If so please do rate my answer. Many Thanks.

Posted on Sep 08, 2009

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,515 Answers

Hi,

There is a chance that this is a ground problem, but probably not. Check all the big fuses in the power boxes under the hood. Not having a diagram, I am guessing that at least 1 or 2 send power to the other fuse box. The terminals on these fuses get a yellow or tan glaze on them which does not look bad, but if it is there, it may also be on the inside of the fuse sockets. This can suddenly bring an otherwise perfectly running vehicle to a dead stop...and not start. The first time I found it was on a Ford 18 passenger bus. Towed in dead. A fingernail file or womens emery boards will fit into these if trimmed and will effectively clean the insides of the socket. You can also try to fold emery paper, but it is not rigid and may be more difficult. Check the relays and their sockets also. Dielectric gel is a good idea when done, especially in a cold climate. I think it is a power problem of course since you say that nothing is on, but in the event that you can't find a contaminated fuse or relay, here is something else to check. Got this from a mechanic friend who found it on a 1994 Bonneville with a no start condition. We are now looking at grounding problems.On many of the Buicks, Olds's and Pontiacs, many of the wires from the dash and some from the engine compartment come together under the door thresholds...under the trim strip that guards the body and also holds the carpet in place at the doorways. These have lousy connections for bad weather climates, and the connections go bad and things just shut down. These grounds are some of the grounds for the under hood relays. You should really have a book with a wiring diagram. It can save you incredible amounts of time, especially if it is year and model specific.

In our model, the relay would be in passenger side fuse box.

Note - Make sure all the battery connections are tight.

If problem persists, let me know.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Posted on Sep 08, 2009

  • taran_2005
    taran_2005 Sep 08, 2009

    Thanks for your response!!

    I hand over the information as you require to know the location of relay.....

    Now, let me help you to fix the problem...There are 5 reasons for non working of fan :-

    Five things may prevent an electric cooling fan from coming on:




    • Defective temperature switch or coolant sensor

    • Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan)
    • Failed fan relay

    • A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)

    • Bad fan motor
    You need to check all the 5 above reasons.

    I have a wiring diagram but that for an older Oldsmobile model.Still, let me offer you as it might help you :-

    http://www.tocmp.com/tOCMP/wiring/5765wi...

    Hope i helped you.

    Thanks for using ' Fixya ' and have a nice day!!



×

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:

2 Answers

Where is the fan relay on 1999 aurora located


Cooling Fan Relay No. 1
Center rear of engine compartment, left of the windshield wiper motor
7 - COOLING FAN #2 Relay
8 - COOLING FAN #3 Relay High Speed Cooling Fan Relay #3
9 - COOLING FAN Fuse
60A
Cooling Fan Relay #1, Cooling Fan Relay #2

Apr 18, 2016 | 1999 Oldsmobile Aurora

2 Answers

Where is the cooling fan relay located


In the engine compartment fuse block. Look at positions 7 and 8. There should be a diagram under the lid.

Apr 18, 2016 | 1999 Oldsmobile Aurora

2 Answers

Why the cooling fan fuse has no power/fuse is good?


The cooling fan is controlled by the PCM via a couple of relays. Try swapping the cooling fan relays and see if the fan starts to work. If that doesn't work than you will likely need a scan tool to determine if there is a fan request from the PCM.

Jul 27, 2014 | 2002 Ford SVT Focus

2 Answers

Fan not working...my car is overheating


The fuses are located in the fuse box under the hood, but could be the fan motor too, check if you have power at the motor

Mar 28, 2013 | 2004 Pontiac Grand Prix

1 Answer

Ck engine light problem on 2001 Impala


Well the code is for the circuit - the computer commands the relay to turn the fan on and it doesn't happen.
The computer provides the ground for the relay.
If you have replaced the relay and the fan and the fuse still blows, I would look for a problem in the harness between the fuse box and the fan, including the ground circuit for the fan.
The fuse for the cooling fan is usually a 30amp marked "cooling fan" in the fuse box in the engine compartment.
Do you know what the 25amp fuse that is blowing is for ?

Jul 30, 2012 | Chevrolet Cars & Trucks

2 Answers

Overheats if left idling but not if driving...cooling fans aren't coming on...what couls be wrong?


the cooling fans on your car are comanded on by the engine control module which reads engine temperature from the temperature sensor . when comanded on the engine control module sends a signal to the cooling fan relays . which in turn runs the current to the cooling fans . So you might want to check the cooling fan relays and make sure the fues for the cooling fans are good and the relays .if the cooling fan fuses and relays are good it could be a problem with the fan motors or the engine control module not reading the right temperature in that case it could mean you have a problem with the temperature sensor

Mar 04, 2011 | 1998 Cadillac DeVille

2 Answers

I have a 1999 chevy cavalier and the cooling fan will not start


CHECK COOLING FAN FUSE AND RELAY.IF BOTH GOOD SCAN CAR TO CHECK COOLANT TEMPERATURE SENSOR FAULT CODE.THE PCM AND COOLANT TEMP. SENSOR IS WHAT CAUSE FAN TO RUN AT CERTAIN TEMPERATURE.IF ALL IS GOOD.HOT WIRE COOLING FAN USING JUMPER WIRES TO BATTERY.IF FAN DONT RUN REPLACE FAN MOTOR.IF FAN RUNS YOU HAVE SHORT OR BROKE WIRE IN THE COOLING FAN ELECTRICAL CONNECTOR.

May 06, 2010 | 1999 Chevrolet Cavalier

2 Answers

Where is location of cooling fan relay?


Under the hood on the drivers side, just forward of the shock tower, you will see what is called an "under hood fuse center". On the cover you can see the various fuses and relays that are located in the fuse center.
One of those relays is the coolant fan relay. Remove the top cover of the fuse center to gain access to the relay.
Hope this answers your question, good luck.
Regards,

May 02, 2009 | 2002 Pontiac Sunfire

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

30 people viewed this question

Ask a Question

Usually answered in minutes!

Top Oldsmobile Experts

yadayada
yadayada

Level 3 Expert

76070 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8266 Answers

Are you an Oldsmobile Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...