Horn not working

Tiny
GREGHOOVER
  • MEMBER
  • 1988 TOYOTA CAMRY
  • 2.0L
  • 4 CYL
  • 2WD
  • 1,890,910 MILES
The horn stopped working replaced the haz-horn fuse under the hood but still does not work. Jumped the horn to battery works fine but no power to the connection in the wheel. What could it be.
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Tuesday, December 19th, 2017 AT 2:35 PM

5 Replies

Tiny
CARADIODOC
  • EXPERT
Go to the horn relay. Remove it, then in the socket, check first for twelve volts. There should be four terminals and two should have twelve volts all the time. Of the other two, read their resistance to ground. One should have real low resistance. That one is going to the horns. The last one should have close to 0 ohms only when the horn switch is pressed.

If all of those appear to be okay, suspect the relay. Be aware the switch circuit can measure okay if only a single strand of a frayed wire is still intact, but that will not allow enough current through to run the relay's coil.

Also, observe if the relay clicks when you press the switch. If it does, you have just eliminated half the circuit as a suspect.
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Tuesday, December 19th, 2017 AT 3:21 PM
Tiny
GREGHOOVER
  • MEMBER
Where is the horn relay located at?
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Tuesday, December 19th, 2017 AT 3:48 PM
Tiny
CARADIODOC
  • EXPERT
It is listed as "behind the right kick panel".
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+1
Tuesday, December 19th, 2017 AT 4:36 PM
Tiny
GREGHOOVER
  • MEMBER
Okay, thanks a lot.
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Tuesday, December 19th, 2017 AT 4:38 PM
Tiny
KEN
  • ADMIN
Hello, '

Here is a guide to help you test the relay and a diagram of the horn relay location (below).

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below)

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Wednesday, December 20th, 2017 AT 6:30 PM

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