Toyota Repair Problems? Ask a Mechanic for Answers ASAP
The horn relay on your car is called an integration relay. In the relay block under the hood, it's the long relay in the middle.
To test it, check continuity between E1 and A8. with battery voltage applied to terminals A6 and A7, You should have less than 1kohm.
Without battery voltage, you should have over 10kohm
If it fails any of these tests, it needs to be replaced
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