As I see it, you want power (fused) to go to relay terminal #86 with
terminal #85 to ground through the horn button (horn button supplies
ground).  This is what will "Activate" the relay.  Then ground relay
terminal #30.  Relay terminal #87 goes to the ground pins of each horn
and the plus side of each horn goes to a fused (16 amp) 12 volts.

You don't want to ground the horns where they mount as Vanagon horns are
activated by supplying ground when the horns are to be honked.

Mike

Jeffrey Vickers wrote:
> Anyone have a diagram for wiring dual horns with two terminals each
> horn? I did what I thought was correct but clearly I am missing
> something.
>
> Relay is is wired:
> --- switched/ignition on power wired to #30
> ---one inside and one outside horn terminal wired to #87
> ---one outside and one inside horn terminal wired to ground
> ---two VW horn leads to #85 & #86
>
> Horns bolt to bracket which is painted and probably not grounded. 87
> Syncro.
>
> Thanks.
>
> Jeff
>