2001 Toyota Sequoia horn works sometimes

Question

2001 Toyota Sequoia horn works sometimes. I changed the fuse. Is it possible that the relay is bad? How would I know?

Answer 1

You will have to test the system logically :

1 supply - is it intermittent

2 switch for operation

3 supply to relay

4 relay

5 supply to horn

6 horn

7 earthing of horn but you can do this first as it is a common issue.

For testing use a test lamp or multimeter : lamp probably better in this case as it gives a more "visual" response when power is there...