Don't know where the wire is on the ECM. Likely issue is the wire or switch in the steering column. Usually get a new switch with wire... There is a 4 wire very small connector on the drivers door side under the dash that goes to this thin wire from the steering column. Codes in the ECM or PMD issues also affect cruise not working. Brake switch will drive you nuts as well for cruise issues.
i will look for the 4 wire connector.....there is no codes....i think my PMD is fine.....i have brake lights.....does the brake switch have more that one set of contacts?