Horn problem

[89REATTAJIM]

On my 2000 expy, sounds like only one horn is working.
1- Any ideas on this problem?
2- Where are the horns located?
Appreciate any help on this...... Jim

 

[GAINMOB]

on my 2nd gen the horn is right in front of the front passenger tire

 

[89REATTAJIM]

Thanx Freeway, found the horns where you said. Wiring looks good, but only one is working. Project for another day....... Jim