Where is horn relay for 2004 lexus ES330 - 2004 Lexus ES 330

SOURCE: Change F to C for my lexus Es330 air conditioner

i dont think its possible was the car from canada? I have heard of but wasnt witness to when the battery was disconnected that the car went to farenheit

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SOURCE: OBD reader for 04 LEXUS ES330

Any OBD2 reader should work. the OBD connector is under the dash just forward of where the drivers knees would be. I think most ALL cars are within 18" of the steering wheel.

SOURCE: how to turn off Check Engine light on 2004 Lexus

Sometimes the light will stay on for 100-500 miles depending on the fault code. You can disconnect the battery to reset it, but you will have to reset the radio and other memory such as seats mirrors.

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SOURCE: How do I change a battery on a 2004 Lexus ES330

I can only think of one way that would ensure you not to lose power to the computer. That would be to hook a pair of jumper cables to a good battery and to the cars cables then disconnect the old put the new in and hook it up withe out knocking off the cables. Just keep the wires away from each other. 2 or more people is very helpful!
Best of luck to ya!

SOURCE: MY LEXUS ES330 2004 MODEL IS MAKING A CLICKING

these models have an electrical servo motor that controls the blend door,the mode door,and the air mix door and when the gears get stripped out and wnat close or open all the way they start making this kind of noise.....i am pretty sure this is what your problem is but not to be there cant be 100% sure....this is a common problem on these models.....you can try to switch the temp control.the fresh recirculate switch,and the switch that controls where you want the air to come out....do these one at a time and see if it changes and if so you can determine which one it is.....i hope that this will help you and if i can help in any other way let me know.....let me and fixya know also if i was any help to you at all and a thumbs up and a comment would be appreciated......thanks and good luck......have a blessed day......