Turn signals quit working on a 1997 Taurus. They were working fine in the morning when the vehicle was taken to a mechanic for front strut replacement. Now they are not working at all. The brake lights work fine. Could a wire been disconnected on the harness or cut?

turn signal switch on column is bad.

I can help you change the turn signal bulbs on your 1997 Ford Taurus

Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter vehicle info. year , make , model . Under system click on lighting ,then under subsystem click on exterior lighting .Then click the search button then the blue links . Looks to me like the daytime running lamps control module suppy's power to the front turn signals .

its probably a bad strut or cv joint- take it to a mechanic for diagnosis.
cv joints usually click when you turn whereas struts can make noises whenever. if the front right corner of the car rides lower i would look at the spring covering the strut- it could be broken.

use the vide3o link for repair guidance
http://www.wonderhowto.com/how-to/video/how-to-replace-front-struts-on-a-front-wheel-drive-vehicle-226043/

check and replace the flasher unit if necessary, sometimes located in the fuse box area, sometimes under the dash near the steering column

Replace the bulb? Remove the bulb from the back of the light by twisting a 1.4 turn. It takes an amber 1157 bulb

I think you are right. The strut or strut mount bearings on the top of the strut could be making noise. The shop might try and rip you off with additional repairs for the control arms,control arm bushings, or steering parts. I would take the vehicle to a reliable shop.

Check the multi function switch(turn signal switch) sometimes dirt will get in the contacts and cause what you're concern is. Will most likely have to replace switch.