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266 Posts
Horn relay info is pretty scant. Only a few photos appear in that search including your own. Perhaps you can use the photo of the 66 Chevelle as a guide along with any more information you can acquire from the Database available Here including the 66 wiring diagram. YES, terminals do matter.
There should be many vendors you can purchase from, but bear in mind this sort of product is usually manufactured in China these days & they've essentially been & still are relatively shut hence the common excuse of "supply chain constraints" which decoded means it's made in China & we've run out of stock. So you may have to spend some time researching & comparing. Having said that it appears Rock Auto currently have stock available, I haven't checked elsewhere. Good luck.
There should be many vendors you can purchase from, but bear in mind this sort of product is usually manufactured in China these days & they've essentially been & still are relatively shut hence the common excuse of "supply chain constraints" which decoded means it's made in China & we've run out of stock. So you may have to spend some time researching & comparing. Having said that it appears Rock Auto currently have stock available, I haven't checked elsewhere. Good luck.