05-08-2013, 04:11 PM
Hi I have done this and you are correct. It's through the cabin. You have to pull off the panel and pull out the vinyl to get to it. Make sure you get the right length horn. The part I recieved was too long and there is no way to make it fit. Try spraying some wd40 in the vent on the stbd side. It will free p the diaphragm which is often the issue. Good luck.

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