I'm replacing the factory horn with a PIAA dual tone horn and i'm a little lost (very little experience with wiring). Do I need to build a wiring harness to do the installation? I couldn't find a walk thru in search. Thanks all.
I think the explanation he gave is he doesn't have the necessary shims to do the job and purchasing them would be cost prohibitive. That's why he referred me to another shop for the work.
It sounds like checking the valve clearance is really what I was referring to.