Thanks Professor, It's a fairly easy job and I now have two working horns.
I pulled the original horn down through the bottom of the bumper on the
pass side after using a 1/4 drive rachet.  Then disconected the connector
and skimmed about 1/2 inch of insulation off the blue/red wire and sodered
a wire to it that was going going to the second horn.  The original horn
wire will pull down a enough with some coaxing.  Wrap with electrical
tape.  I purchased a horn with connector at a salvage yard. The other wire
from the new horn was connected to ground and the job is done. Remember to
disconnect the battery before doing this job.