Cruise Control Will Not Engage, Speedometer Operates

NORMALLY

1. Turn ignition off. Disconnect cruise control module connector. Turn ignition switch to RUN. Using a test light, check for battery voltage at terminal "F" of cruise control module harness connector. If battery voltage is present at terminal "F", go to next step. If battery voltage is not present at terminal "F", check fuses and check wire to terminal "F" for open or poor connection. See WIRING DIAGRAMS  .
2. Using a DVOM or test light, check module ground at terminal "E". If module ground is okay, go to next step. If module ground is not okay, service Black or Black/White wire from chassis ground to cruise control module.
3. Ensure ignition switch is still in RUN position. Set cruise control slider switch to ON position. Using a test light, check for battery voltage at terminals "B" and "C" of cruise control module connector. If battery voltage is not present at either terminal "B" or "C", go to next step. If voltage is present at terminal "B", check Dark Blue wire for short to battery voltage. If voltage is present at terminal "C", check Dark Green wire for short to battery voltage.
4. Using a test light, check for battery voltage at terminal "A" of cruise control module connector. If battery voltage is present, go to step 6). If battery voltage is not present at terminal "A", check for battery voltage to cruise switch. (Check at connector at base of steering column). Battery voltage should be present at Dark Blue wire. If battery voltage is present, go to next step. If battery voltage is not present, check for open in Dark Blue wire between fuse panel and cruise control switch.
5. Check for open in Gray wire between cruise control switch and cruise control module. Repair Gray wire if necessary. If Gray wire is okay, replace cruise control switch/multifunction lever assembly.
6. Check for battery voltage at terminal "D" of cruise control module connector. If battery voltage is present, go to next step. If battery voltage is not present, backprobe Dark Blue at clutch pedal switch (M/T) or brake pedal switch (A/T). If battery voltage is not present, service Dark Blue as necessary. If voltage is present, check clutch or brake pedal switch operation, replace as necessary.
7. Check brakelight operation. If okay, go to next step. If brakelights do not operate properly, backprobe Orange wire of brakelight switch connector. If voltage is not present, service Orange wire to STOP/HAZARD fuse in instrument panel fuse panel. If voltage is present at Orange wire of brakelight switch connector, backprobe Yellow wire of brakelight switch connector and press brake pedal. If battery voltage is not present, replace brakelight switch. If battery voltage is present, unplug brakelight switch connector. Using a DVOM, check for open in yellow wire between brakelight switch and cruise control module.
8. Connect a test light to terminal "B" of cruise control module connector. Press and hold SET switch. If test light glows, step 10). If test light does not glow, use a test light and backprobe cruise control switch terminal "K" (Dark Blue wire) to ground. Press and hold SET switch.
9. If test light lights, check for poor connection at cruise control switch terminal "K" (Dark Blue wire). If wire is okay, repair open circuit in Dark Blue wire between cruise control switch terminal "K" and cruise control module terminal "B". If test light does not light, check for open circuit at cruise control switch terminal "K" (Dark Blue wire). If switch terminal is okay, check for open circuit in Dark Blue wire inside steering column. If wiring is okay, replace cruise control switch.
10. Connect Instrument Panel Tester (J 33431) to vehicle speed sensor connector. Set tester to 60 Hz scale. Measure frequency of signal at cruise control module connector terminal "K" (Green/White wire). If frequency is not 60 Hz, go to step 12). If frequency is 60 Hz, go to next step.
11. Check for poor connection at cruise control module. Check for proper operation of mechanical link cable. If connection and cable are okay, replace cruise control module. Ensure cable strap is not twisted during installation.
12. If frequency is not 60 Hz, check if speedometer is at about 54 mph. If speedometer is not at about 54 mph, check if instrument panel tester is correctly installed. If tester is correctly installed, check vehicle speed sensor. See VEHICLE SPEED SENSOR (VSS) TEST  .
13. If speedometer is at about 54 mph, check for poor connection at 17-pin connector terminal A1 (Dark Green/White wire) located behind left kick panel. If connection is okay, repair open circuit in Dark Green/White wire between cruise control module terminal "K" and splice.