Has the airbag ever deployed? Does the horn work? The wiring for the horn and cruise control go through the clockspring. If the airbag has deployed, it almost certainly destroyed the clockspring, which is under the airbag. If the horn doesn't work, that's a sign the clockspring is bad. You also need a good airbag, whether it's operational or not, for the horn to work. When I bought my '01 Sport Trac, neither the horn or cruise control worked. Previous owner had hit a deer causing the airbag to deploy. New clockspring fixed the cruise, and a junkyard airbag completed the fix for the horn. The clockspring MUST be for a Sport Trac or '01-03 Explorer Sport (or Ranger, I think) with cruise control. Trucks without cruise used a different clockspring, and the clockspring for 4 door Explorers and earlier Sports has a different connector for the wiring.