Speed Control Will Not Slow Down

Fig. 9 PCM 40-Way Connectors:

Check for diagnostic trouble codes. If code 34 or no code present, perform the following test:
1. Conduct the speed control switch test on the resume SET/COAST.
2. If it fails, replace switch.
3. If it passes use an ohmmeter to test continuity between pin 2 of SET/COAST switch connector and ground. Wiggle wires while performing test. If no continuity repair circuit.
4. If continuity, test continuity between pin 1 of SET/COAST switch connector and pin 41 of the PCM 40 way connector. Wiggle wires while performing test. If no continuity repair circuit.
5. If continuity, disconnect the servo connector. Test continuity from pin 2 of connector and ground to test for intermittent short. Wiggle wires while performing test. If continuity repair circuit.
6. If no continuity, conduct the servo vacuum test. If it fails, replace servo.
7. If it passes, replace the PCM