1985 K20. Need inspection to get tags. How to wire external horn button?

[Rickf]

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[RustyPile]

My horn does not work. Im going to wire in a small horn button. What is the best easiest way to wire it up
without running a wire all the way to the horn?

Anyone know the horn wire color running into the column? How have you done it. Thanks

The horn circuit is a simple relay controlled circuit.. Three wires and a relay make up the entire circuit. It would probably be easier to repair the circuit than to design and engineer a completely new circuit.. .

Refer to the wiring diagram for the following. The relay's common contact and winding are powered by the orange wire (circuit #240), same wire that powers the cigarette lighter, clock, and several other circuits calling for "always hot" power feed. The dark green wire (circuit #29) connects the normally open relay contact to the horn itself. The black wire (circuit #28) provides the ground path for the relay winding. The wire is part of the turn signal harness which goes up the column back to the factory horn button on the steering wheel. Push the button, the ground path is completed -- the relay winding is energized completing the path between circuit #29 and #240. Voltage/current travels down the dark green wire (#29) and the horn sounds off.

I'll offer this advice to anyone doing electrical work.. Working without a proper wiring diagram is akin to threading a needle while wearing a blindfold.