Hello--

I just bought an early 88 Samurai with a non-working horn. I had 12v coming to the horn with the white line so here's what I did:

1) confirmed ground on steering column
2) cleaned contacts of horn mechanism with sandpaper
3) re-installed--horn working intermittently
4) pulled steering wheel--found horn ring was heavily oxidized.
5) horn ring secured with what appear to be "dimples" from the steering wheel plastic.
6) took razor blade and carefully carved away the dimples and removed the horn ring
7) sandpaper to clean then placed some dielectric grease on both sides
placed ring back on horn
9) took a 1/4" metal punch and heated it (not too hot!) and pressed down on the steering wheel plastic next to where the old dimples were. I did this maybe 6 times to melt and press a little plastic around the ring to secure.
10) replaced steering wheel and torqued to spec.
11) beep beep!

I hope this helps someone in a similar predicament-


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Edit: early horn ring cleaning


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I've done all of this and still had such a faint horn, I just bought a new steering wheel , Maruti from India on eBay. worked great but then I also replaced single factory horn with two Toyota horns so sounds like a current import