Hi,
Unfortunately there is not much relation between the horn and the lights. The issue with the lights at this point could be your integrated power module as each of the fuses come from this module. They would need to test to see if there is power coming out of the fuse and if not and the fuse is okay, the circuit board on this module is most likely the issue.
As for the horn, more than likely that this is either a fuse/relay or the steering column clock spring.
Obviously, if you are taking this in, then we can let them do the testing but if you want more information here is a link to information about a clock spring:
https://www.2carpros.com/articles/symptoms-of-a-bad-airbag-clock-spring
Let me know what they find because that info could help others that visit the site with the same issue. Thanks
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Saturday, September 28th, 2019 AT 7:37 AM