That's a ground, and there are two of them that go under the head of the screw that attaches the horn relay to the radiator support - one comes out of the harness, and the other is a separate wire that's screwed to the base of the voltage regulator.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.