There are two electric wires to the intake manifold mounted horn in the mid-1930's. They are protected by a zinc plated conduit between the two horn contacts and where they connect to the main wiring harness beside the six cylinder Chevy engine.

207 Engine

1934-36

The 1936 and earlier 207 engine manifold does not have a connection for the conduct from the horn. Therefore, it leaves the horn and runs beside the engine valve cover forward and down to the main wiring harness. A clip stabilizes the conduit by using a bolt on the water pump.

216 Engine

1937-38

The first two years of the 216 engine [1937-38], this conduit also extends between the horn and wiring harness. It lays over the intake and then vertically down to the main wiring harness. A clip now secures the conduit to the new manifold horn extension bracket.   IMPORTANT NOTE: If it seems confusing, these photos should make it much easier to understand. In summary, the two different ways the horn mounts to the intake manifold results in the 7/16th conduit protecting the two wires from accidental damage over the years.