Question about 1999 Lexus RX 300

1 Answer

Need to identify the blower motor fuse and or relay for 1999 lexus rx 300

Posted by on

  • s279mitchell Nov 17, 2010

    thank you for the solution.It makes sense to me.Ive checked everything else and had a feeling I needed to get under the dash.You guys are great.

×

Ad

1 Answer

  • 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.

  • Lexus Master
  • 76,164 Answers

The problem is the blower motor linear speed controler, it is a solid state relay. Here is how you replace it and test it from a Lexus repair site. I can almost 100% assure you the blower motor controller is the problem, but here is the testing and the location of part.

Our big issue will be with accessing the blower motor controller, or relay. Lexus calls it a relay, but it is actually a linear controller. for access, removing the glove box may come in handy to access it, but will not make it entirely accessible. To get to it, you will need to basically lay on your back with your head up under the dash on the passenger side looking up. Then the trick is to get your hands up to the relay. I know it sounds crazy, but believe me, we don't like doing this kind of stuff either. There are 2 separate black boxes under the dash. The one just above the passenger foot-well is the blower box and houses the blower motor. To the inside of that is the evaporator box that has the evaporator and heater core inside. The boxes are mode to fit together and form an air duct between them. In this area is where the relay is. It is a box with 2 connectors going to it. One connector will have 2 wires, 1 red and 1 black. These go to the blower motor. The other connector has 3 wires. 1 is a power, 1 is a ground, and the one in the middle is the signal wire. It will be pink with a blue stripe and will be smaller than the other 2. Here is what we need to do once we have accessed this relay. You may have to remove it to get a good shot at the connectors, but we do want the connectors to remain plugged in. We want to backprobe the pink/blue wire. Be careful not to pierce the wiring insulation. We just want to insert the backprobe pin next to the wire until it touches the metal on the end. With that inserted, set the volt meter to AC volts. With the key on (you will probably need help here) hold the red lead to the backprobe pin and the black lead to a GOOD ground, such as an exposed part of the dash frame. Start with the fan control on the lowest setting and slowly increase it towards max. What you should see is a small AC voltage that increases as the knob is turned towards max. If you see this (and I think probably will), then the relay where we are testing will need replacement

Posted on Nov 14, 2010

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 1999 lexus rx 300 awd and srs light stays on


John, needs to be scanned to determine fault.

Feb 21, 2016 | 1999 Lexus RX 300

1 Answer

1999 lexus rx 300 need help to know were the a/c fan relay is locaited


Its in the dash, far left side in a juction box, trim will need to be removed. What exactly is the problem? If the motor doesnt work, rap on it a few times, if it starts to blow, replace the blower motor. If not, check if both wires have power, if they do, then the blower controller may be bad.

Dec 24, 2009 | 1999 Lexus RX 300

1 Answer

No heat or air comes out and was told that the blower motor control was inoperable. Do I need to replace the entire blower motor or is the blower motor control a separate part?


If you have no heat blowing and no force of air in AC or blower mode , your blower motor (fan portion) under dash is the likely culprit. Check your fuses before diving in. As the motor wears the carbon brushes wear out.
A common symptom is that the motor starts and stops going over a bumpy road where its brush connection is intermittently bounced on and off.
If you only have alow or intermediate speed , that would be linked to the speed and motor controls.

Dec 11, 2009 | 1999 Lexus RX 300

1 Answer

HAVE 1999 LEXUS RX 300 AND POWER MIRRORS STOPPED WORKING. I SEE NO FUSE OR RELAY, HELP!


I had the same problem with the power mirrors and I found the cigarette lighter fuse blown, I replaced it and the mirrors worked.

Oct 31, 2009 | 1999 Lexus RX 300

3 Answers

1999 RX 300 Lexus Blower Motor


blower motor bearings going out ,,,replace motor

Jul 04, 2009 | 1999 Lexus RX 300

1 Answer

Where can I find a fuse box diagram for a 1999 Lexus 300 RX?


pull the fuse panel cover and look on the back. If not there go to mitchell on demand.

Mar 28, 2009 | 1999 Lexus RX 300

1 Answer

The heater fan shut off and all fuses check out could it be a relay thay dont have them marked in the maual


If your fuses check good it's probably one of two things. First try taking down the black cover underneath the glovebox--it just clips up into the dash if you use a flathead screwdriver between the cover and glovebox to gently pry down on it. Then using the screwdriver handle, and with the key on/fan switch on, tap on the blower motor (with the large black connector that has one black wire & one red wire) if that doesn't get it to start spinning then you probably have a faulty blower motor relay controller (that's buried a little farther down, in, and to the left of the blower motor). Either of the two are known to go out on this model/year.

Dec 28, 2008 | 1999 Lexus RX 300

1 Answer

How do I remove Head Light assembly on my 1999 Lexus RX 300


After removing the top and side bolts (which are obvious) Go to the fender liner. Remove all but the top screw . You will find (by flashlight or shop light) two bolts coming out of the headlight rear. With a socket wrench and 10mm socket, remove the two nuts on the headlight and pull out the headlight from the front after insuring the bulbs are removed and identified for reinstall. Take your time. It is not difficult.

Dec 27, 2008 | 1999 Lexus RX 300

Not finding what you are looking for?
1999 Lexus RX 300 Logo

Related Topics:

679 people viewed this question

Ask a Question

Usually answered in minutes!

Top Lexus Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

ROBERT GARCIA
ROBERT GARCIA

Level 3 Expert

902 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides

Loading...