Let's start by checking the fuses because the IPDM controls the horn operation, and it can be having a feedback issue. Please check fuse # 50 and #51 in the fuse panel in the right rear of the engine compartment and fuse #31 and 38 in the fuse link box.
Here is a guide to help and I have included the horn wiring diagram so you can see how the system works:
https://www.2carpros.com/articles/how-to-check-a-car-fuse
Check out the images (below). Please let us know what you find.
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Saturday, November 5th, 2022 AT 10:51 AM