Question about 1993 Toyota Corolla

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1999 toyota corolla Horn doesn't work.

Changed fuse and horn relay with parts that I know are good. Still no power supply to horn. Is there a fuse somewhere in between the steering column and the fuse box. What wire in the steering column is for the horn? How do I access the steering wheel horn switch (where the pad sets off the horn)

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  • dickandrade Aug 27, 2008

    I tested the power supply as suggested and there is no response from the tester.

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Usually the wire from the steering wheel is Green w/Red and the wire to the horn from the fuse box is White. There is only one fuse, sometimes shared with the emergency lights. Check to see if there is power to the horn itself with a volt meter.

Posted on Dec 30, 2008

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Have you checked the horn itself? try disconnecting the power line to the horn and check power supply with a simple tester. have someine assist you to press on the horn switch while you are checking. if the tester needle deflects then it could be the horn. P.S. make sure you set your tester to 12volt/24 volt dc setting. GOOD LUCK!

Posted on Aug 26, 2008

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Here are some notes directly from chrysler, let me know if you need any clarification:

Testing and Inspection Notes WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS AND SEAT BELTS/AIRBAGS BEFORE ATTEMPTING STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

  1. Disconnect and isolate the battery negative cable. Remove the lower steering column cover/knee blocker. Check for continuity between the metal steering column jacket and a good ground. There should be continuity If OK, go to Step 2. If not OK, refer to Steering and Suspension/Steering Column and check for proper installation of the steering column mounting nuts.
  2. Remove the driver's airbag module. Unplug the horn switch wire connector. Remove the horn relay from the Power Distribution Center (PDC) . Check for continuity between the steering column half of the horn switch feed wire connector and a good ground. There should be no continuity If OK, go to Step 3. If not OK, repair the short circuit as required.
  3. Check for continuity between the steering column half of the horn switch feed wire connector and the horn relay control circuit cavity for the horn relay in the PDC. There should be continuity If OK, go to Step 4. If not OK, repair the open circuit as required.
  4. Check for continuity between the horn switch feed wire and the horn switch ground wire on the airbag module. There should be no continuity If OK, go to Step 5. If not OK, replace the faulty horn switch.
  5. Depress the center of the airbag module cover and check for continuity between the horn switch feed wire and the horn switch ground wire on the airbag module. There should be continuity If not OK, replace the faulty horn switch.

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sounds like your clockspring or a fuse test for power going into the clockspring please rate -jeff

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