no engine told 2.3,3.0,4.0 , gas or diesel not told
seems diesel is 1995 and in South america's only.
no vin told.
if it has one, (the speed control version yes, and no speed control NO relay.
bench test the horn yet
or hot wire it in place , actual horn
or ground to the horn is bad as all are that old
dead horn
fuse 8 is first. if blown horn will be dead.
I guess speed controls means CRUISE.?
the steering wheel has cruise there is a relay
if not , such relay is there. proof below. (solid proof)
left side is cruise
right is non cruise opted car. Service manual drawing.
no engine told and matters.
wiring always does on different opted engines.
here is speed control words.? service manual SM.
Modern name is ISC
"On vehicles equipped, the DC motor/idle speed control actuator is mounted to the fuel charging assembly. This component controls the idle speed, including such functions as high cam rpm, anti-diesel shut off, dashpot and pre-positioning the engine fuel charging assembly for restart. This control actuator is driven by the EEC-IV system, which includes an integral idle tracking switch".
bad fuse F8 OR WRONG SIZE USED, AMPS WRONG.,MISSING
HORN FUSE IS 20AMPS IIRC.
bad slip rings
bad horn switch.
bad relay if fitted
both horns bad.
both horns 1 ground are rusty , horns work benched tested
GOOD LUCK