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Air conditioner not working

Tiny
TREEGA6059
  • MEMBER
  • 2005 TOYOTA COROLLA
  • 109 MILES
I replaced fuses, blower, resisters, relay. Air condition light doesn't come on. I didn't put in the 40 Amp fuse like it says on the diagram. When I installed all of these, it came on and felt air condition and the light came on, then when I turned off the car and turned it back on it didn't work at all. I was so excited when it came on but disappointed when It didn't work again. I have one 40 amp fuse, I see two spots for the 40 amp, but the plastic casing doesn't say what its used for. I might buy another one in the morning and put them both in? Successful first and then failure after I started the car again.
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Tuesday, December 25th, 2018 AT 11:38 AM

76 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

You replaced everything but you did not check any voltages.

do you have a voltmeter or test light to check voltages especially at the relay?

https://www.2carpros.com/articles/how-to-check-wiring

I attached a wire diagram for you. check the fuses and make sure there is voltage on both sides of the fuses with the key on.

Roy
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Tuesday, December 25th, 2018 AT 12:35 PM
Tiny
TREEGA6059
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  • 46 POSTS
I tested just the air condition part with key on and off but no light came on. I Have both. Light tester and multimeter. I just tested and found a lot of fuses dead, but in the morning I will test with the car on. I did it with the light under the hood and also under the steering wheel. I will get back to you as soon as I do that. Some worked and some no light. I will purchase some more fuses in the morning, just to be on the safe side. It is bound to be one of these. Hope so?
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Tuesday, December 25th, 2018 AT 2:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay.

Keep me updated.

Roy
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Tuesday, December 25th, 2018 AT 3:18 PM
Tiny
TREEGA6059
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  • 46 POSTS
Have a nice Christmas and New Year and I am grateful for your help and this site.
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Tuesday, December 25th, 2018 AT 3:49 PM
Tiny
ASEMASTER6371
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Thank you. Same to you and yours.

We are always glad to help.

Roy
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Tuesday, December 25th, 2018 AT 3:51 PM
Tiny
TREEGA6059
  • MEMBER
  • 46 POSTS
Used a test light on A/C and heater fuses with the car off and on. Not a single sign of life.
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Wednesday, December 26th, 2018 AT 8:52 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Which fuses and where? Can you take a picture and upload it to this post?

Roy
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Wednesday, December 26th, 2018 AT 8:53 AM
Tiny
TREEGA6059
  • MEMBER
  • 46 POSTS
Under the steering wheel. I will try to get it to you. Thanks Roy. There is a 10 amp A/C and 40 amps for heating. One for the air conditioning system and HTR 40 A air conditioning system. Those are the ones I changed.
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Wednesday, December 26th, 2018 AT 9:18 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Okay, get me the photo so I can see what you see.

Roy
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Wednesday, December 26th, 2018 AT 9:21 AM
Tiny
TREEGA6059
  • MEMBER
  • 46 POSTS
First three under the steering wheel. Last shot is under the hood fuse box. Not much of a camera man but tried. I will try again if you want but I had to do aerobatics along with juggling the camera with the light. The third picture is where I changed the fuses. 40 and 10 amps. Thank you again!
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Wednesday, December 26th, 2018 AT 10:58 AM
Tiny
ASEMASTER6371
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Good.

Did you check for power on both sides of the fuse with the key on?

Roy
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Wednesday, December 26th, 2018 AT 12:52 PM
Tiny
TREEGA6059
  • MEMBER
  • 46 POSTS
With the motor running? Or just turn the key and see lights go on. If I do it again should I use the testing light?
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Wednesday, December 26th, 2018 AT 12:59 PM
Tiny
ASEMASTER6371
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Key on, engine off.

Yes, use the test light.
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Wednesday, December 26th, 2018 AT 1:12 PM
Tiny
TREEGA6059
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No power with either of those fuses.
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Wednesday, December 26th, 2018 AT 1:25 PM
Tiny
ASEMASTER6371
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It looks like you have an issue with the fuse box itself as that is what provides power to the 40 amp fuse.

Try wiggling around the connectors and see if you can get power to the fuse.

Roy
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Wednesday, December 26th, 2018 AT 1:33 PM
Tiny
TREEGA6059
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  • 46 POSTS
Wiggle the fuse? Or the wire to the fuse box?
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Wednesday, December 26th, 2018 AT 1:37 PM
Tiny
TREEGA6059
  • MEMBER
  • 46 POSTS
I am wondering if I could replace the fusebox and how much it would cost to buy one?
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Wednesday, December 26th, 2018 AT 3:58 PM
Tiny
ASEMASTER6371
  • MECHANIC
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The wires. See if wiggling them makes a difference.

The fuse box is a couple hundred dollars and the labor is 2 hours to change it.

Roy
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Wednesday, December 26th, 2018 AT 4:12 PM
Tiny
TREEGA6059
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I will do that while the car is on or off?
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Wednesday, December 26th, 2018 AT 4:34 PM
Tiny
ASEMASTER6371
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With the key on engine off. Use the test light to check for power while wiggling the wires.

Roy
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Wednesday, December 26th, 2018 AT 5:25 PM

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