Hover over a wire to confirm the colour
2-wire Horns (pre-77)
The earth for the horn push comes from the body via the crossmember, rack, steering column U/J and column.

1-wire Horns (77-on)
Relay option not shown for this as any bad connections should be relatively easy to solve, unlike the earth path of the 2-wire horns.

2-wire Horn Relay