I had the very same problem
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- horn working intermitantly though.
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Checked all the wiring to the horns
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- OK
Could hear the Relay clicking, took relay cover off could see the bit moving and making contact but still no sound.
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Only made sound when i manually assisted the reed in the relay to make contact.
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So although it looked like it should work it wasn't.
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Went down the scrap yard got a relay out of a Corrola
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- same type.
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Hey Presto
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- Working again.
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