1996 Ford Taurus Cruise control and horn not working

TESTING SYSTEM INOPERATIVE 1. Check Power To Servo - Unplug harness connector from servo. Turn ignition on. Using DVOM, measure voltage between pins No. 7 and 10 of servo connector. See Fig. 1 . If battery voltage exists, go to step 4). If battery voltage does not exist, go to next step. 2. Check Power To Servo - Turn ignition on. Check for battery voltage between servo connector pin No. 7 and chassis ground. If battery voltage exists, go to next step. If battery voltage does not exist, check fuses and replace as necessary. If fuses are okay, repair open power circuit. If fuse repeatedly blows check circuit for short to ground and repair as necessary. 3. Check Module Ground - Measure resistance between servo connector pin No. 10 and chassis ground. If resistance is less than 5 ohms, repeat step 1). If resistance is greater than 5 ohms, repair ground circuit. 4. Check Deactivator Switch Circuit - Turn ignition on. With brake released, measure voltage between pin No. 9 at servo connector and ground. If battery voltage exists, go to step 7). If battery voltage does not exist, go to next step. 5. Check Power To Deactivator Switch - Disconnect deactivator switch harness connector. See DEACTIVATOR SWITCH LOCATION table. Check for battery voltage at deactivator switch Light Green/Red wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for blown fuse or open circuit. Repair as necessary.

6. Check Deactivator Switch-To-Servo Circuit - Measure resistance between servo connector pin No. 9 and matching wire color at deactivator switch harness connector. If resistance is less than 5 ohms, replace deactivator switch. If resistance is greater than 5 ohms, repair open circuit between deactivator switch and servo connectors. 7. Check Stoplight Switch - With brake pedal released, measure voltage on pin No. 4 at servo connector. If battery voltage exists, replace stoplight switch. If battery voltage does not exist, go to next step. 8. Check Stoplight Circuit - Measure voltage on pin No. 4 at servo connector while depressing brake pedal. If battery voltage exists, go to step 12). If battery voltage does not exist, go to next step. 9. Check Stoplight Switch Resistance - Disconnect stoplight switch. Measure resistance across stoplight switch terminals while exercising switch. On probe, measure across terminals No. 1 and 4. If resistance is less than 5 ohms with brakes applied, go to next step. If resistance is greater than 5 ohms, with brakes applied, replace stoplight switch. 10. Check Power To Stoplight Switch - Disconnect stoplight switch harness connector. Check for battery voltage at stoplight switch Light Green/Red wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for blown fuse or open circuit. Repair as necessary. 11. Check Stoplight Switch-To-Servo Circuit - Measure resistance between servo connector pin 19. Check Vehicle Speed Sensor (VSS) Circuit - Test drive vehicle. If speedometer is inoperative, diagnose and repair VSS or VSS circuit as necessary. See appropriate TESTS W/CODES article in ENGINE PERFORMANCE section. If speedometer operates okay, Disconnect harness connectors from VSS and servo. Measure resistance of wire between servo pin No. 3 and same color wire at VSS harness connector. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open in VSS (servo pin No. 3) circuit. 20. Check For Broken Or Binding Servo Cable - Remove servo cable from servo. Check for broken or binding cable by pulling on cable ball slug. Replace cable as necessary. If cable is okay, replace servo. SET SPEED FLUCTUATES 1. Check Servo Cable & Throttle Linkage For Binding - Verify condition. Ensure engine is properly tuned. If condition occurs when cruise control is off, repair engine as required. If condition only occurs when cruise control is activated, check servo cable, throttle linkage, or throttle plate for binding or sticking. Repair as necessary. 2. Check Vehicle Speed Sensor - Unplug VSS connector. Measure resistance between VSS terminals. If resistance is not 200-300 ohms, replace VSS. If resistance is 200-300 ohms, check VSS circuit for open or short. If wiring is okay, go to next step. 3. Replace Servo - Substitute a known-good servo. Test drive vehicle and check for proper cruise control operation. If speed still fluctuates, check PCM for stored codes. See appropriate TESTS W/CODES article. SYSTEM DOES NOT DISENGAGE WHEN BRAKES ARE APPLIED 1. Check Deactivator Switch Circuit - Disconnect servo connector. Without brakes applied, measure voltage between servo connector pins No. 9 and 10. If battery voltage exists, go to next step. If battery voltage does not exist, repair deactivator circuit. See SYSTEM INOPERATIVE test. 2. Check Deactivator Switch Operation - Disconnect servo connector. Apply brakes. Measure voltage between servo connector pins No. 9 and 10. If battery voltage exists, replace deactivator switch. If battery voltage does not exist, go to next step. 3. Check Stoplight Switch - Unplug servo connector. With brakes applied, measure voltage between servo connector pins No. 4 and 10. See Fig. 1 . If battery voltage exists, go to next step. If battery voltage does not exist, replace brake switch, fuse, or repair open circuit. 4. Check For Binding Servo Cable - Remove servo cable from servo. Check for breaks or binding by pulling on cable ball slug. If throttle does not operate freely, check throttle plate operation. Replace cable if necessary. If cable is okay, replace servo assembly. COAST, RESUME OR OFF FUNCTION INOPERATIVE Unplug servo connector. Measure resistance between pins No. 5 and 6 of servo connector while depressing each function switch and rotating steering wheel. If all resistance readings are as specified, replace servo. See CONTROL SWITCH RESISTANCES table.
HORN Disconnect horn switch connector(s). Continuity should not exist between horn switch wires with horn button(s) released. Press horn button(s). Continuity should exist.

The cruise deactivator is on the brake pedal arm above the BOO(brake on off) switch. I don't know about the edmonds problem, that would be something the admins did!

Wiring diagram emailed to you, pin 9 shows an orange wire to the deactivator switch.

Try unplugging the deactivator, use a jumper wire accross the plug terminals, go for a test drive. Let us know. The light green/red wire on the BOO and deactivator are shared, and have the same fuse.

12. Check For Stuck ON Switch - With no cruise control switches pressed, check voltage on pin No. 5 at servo connector. If battery voltage exists, replace cruise control switch assembly. If battery voltage does not exist, go to next step. 13. Check ON Switch Operation - While pressing cruise control ON switch, measure voltage of pin No. 5 at servo connector. If battery voltage exists, go to step 17). If battery voltage does not exist, go to next step. 14. Check For Power To Clockspring - Disable air bag system. See AIR BAG RESTRAINT SYSTEM article. Disconnect clockspring connector at base of steering column. Turn ignition on. Check for battery voltage Yellow/Light Green wire at harness connector at base of steering column. If battery voltage exists, go to next step. If battery voltage does not exist, replace blown fuse or repair open circuit between fuse panel and clockspring connector. 15. Check Clockspring - Disable air bag system. See AIR BAG RESTRAINT SYSTEM article. Disconnect clockspring connector at base of steering column. Remove drivers-side air bag module. Remove cruise control actuator switch assembly. Measure resistance of all wires between base of steering column and actuator switch connector on clockspring. Rotating steering wheel. If resistance is greater than 0.5 ohm on any circuit, replace clockspring. If resistance is less than 0.5 ohm on all circuits, go to next step. 16. Check Circuits From Clockspring To Servo - Disconnect servo electrical connector. Measure resistance between servo terminals No. 5 and same color wire in clockspring connector (harness side) at base of steering column. See Fig. 1. Repeat procedure for servo connector terminal No. 6. If resistance is greater than 3 ohms, repair suspect wire(s). If resistance is less than 3 ohms, check circuits for short to ground and repair as necessary. If okay, go to next step. 17. Check For Stuck Switch - Disconnect servo connector. Measure resistance between terminals No. 5 and 6 at servo connector. Do not press any cruise control switches on steering wheel. If resistance is greater than 3000 ohms, go to next step. If resistance is less than 3000 ohms, replace cruise control command switch assembly. 18. Check Switch Resistance - To check switches, measure resistance between pins No. 5 and 6 of servo connector while pressing each control button. If any resistance is not as specified, replace control switch assembly. See CONTROL SWITCH RESISTANCES table. If all resistances are as specified, go to next step. CONTROL SWITCH RESISTANCES 19. Check Vehicle Speed Sensor (VSS) Circuit - Test drive vehicle. If speedometer is inoperative, diagnose and repair VSS or VSS circuit as necessary. See appropriate TESTS W/CODES article in ENGINE PERFORMANCE section. If speedometer operates okay, Disconnect harness connectors from VSS and servo. Measure resistance of wire between servo pin No. 3 and same color wire at VSS harness connector. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open in VSS (servo pin No. 3) circuit. Button Depressed Ohms COAST 115-125 OFF 0-4 RESUME 2090-2310 SET/ACCEL 645-715
Aorry about the missing info, hope this helps! Did you try my suggestion yet?

No other connector at the end of the steering column? When you jump the switch, unplug the connector, and jump at plug end of the harness, not the switch!

It shows light green in the diagram test that one also check your horn relay under the hood in the power distribution center. Relay #29.

Test for power at the relay socket And check fuse #19 in the power distribution center.

Then either the relay or the switch on steering wheel are no good, or the clockspring you got was defective? Horn needs to work for cruise to work! Take clockspring back and see if they will give you a new one.