A lot of articles in that and similar magazine just continue to amaze me. In your attachment note 01 talks about using 87a for connecting to an extra horn. That would work out great, if you wanted the second horn on all the time... When you hit the horn button the other horn comes on and the second horn goes quiet. I suppose you could wire in a second relay to 87a of the first relay which will then be activated when the horn button is not pushed, with the second horn connected to 87a... It takes me less than 20 mins to read those magazines, they do have nice pictures sometimes. No wonder Car Craft went under.
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