Have a 2016 Lincoln Navigator. When engaging the multi function switch for a left turn, it will not cancel when the steering wheel is returned to center unless I turn wheel slightly to the right.

double posted, with 1999 added.
the FSM says dont reuse steering wheel bolts.. (unique)
here is an online quote to get to the combo switch
quote;
Removal & Installation

1. Disconnect and isolate the battery negative cable. WARNING(bags can kill, my comment)
   Wait two minutes for the airbag system reserve capacitor to discharge before performing further diagnosis or service.
2. From below the steering column, remove the three screws that secure the lower steering column shroud to the multi-function switch mounting housing.
3. Using hand pressure, push gently inward on both sides of the upper shroud near the parting line between the upper and lower shrouds to release the snap features that secure the two shroud halves together.
4. Remove both the upper and lower shrouds from the steering column.
5. Remove the Steering Control Module (SCM) from the steering column.
6. Remove the two screws that secure the left multifunction switch to the SCM .
7. Disengage the two retaining tabs , next to the screw mounts that secure the left multi-function switch to the SCM.
8. Disconnect the left multi-function switch from the SCM.

To install:

1. Position the left multi-function switch onto position on the Steering Control Module (SCM) .
2. Engage the two retaining tabs, next to the screw mounts that secure the left multi-function switch and firmly snap into place.
3. Install the two screws that secure the left multifunction switch to the SCM. Tighten the screws to 22 inch lbs. (2.5 Nm).
4. Position the lower steering column shroud to the underside of the steering column.
5. Install the three screws that secure the lower steering column shroud to the multi-function switch mounting housing. Tighten the screws to 17 inch lbs. (2 Nm).
6. Position the upper column shroud over the steering column with the hazard warning switch button inserted through the hole in the upper shroud.
7. Align the snap features on the upper and lower shrouds and apply hand pressure to snap them together.
8. Reconnect the battery negative cable.

What type of vehicle are you talking about? And does the opposite side operate correctly? What are you referring to when you say stalk returns to off position? If you are talking about the directionals or turn signals of this vehicle as to when you make either a left or right turn and it not shutting off when the steering wheel is turned back after the turn has been made then you're dealing with a canceling function within the directional or multi-function switch.Not sure if this is what you're talking about when you are reffering to indicator flashing.

There is another technical service bulletins for a faulty power steering return hose causing a shudder during turns on the aviators, but this is only felt in the steering wheel and not the entire vehicle.

Try turning the steering wheel to the left and the right while trying to turn the key , you may have set the steering lock after installing the wrong key , you may have to turn it kind of hard each way untill the the key turns once it starts you shouldn't have any problems after that.

SECTION 211-05: Steering Column Switches 1998 Expedition/Navigator Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 02/11/2000 Multifunction Switch Removal

1. Disconnect the battery ground cable (14301).

1. Remove the ignition switch lock cylinder (11582).
   1. Insert the ignition key into the ignition switch lock cylinder and turn to the RUN position.
   1. Insert a punch through the hole in the lower steering column shroud and push the ignition switch lock cylinder release tab while pulling out the ignition switch lock cylinder.

1. Twist the tilt wheel handle and shank (3F609) and remove.

1. NOTE: Move gear selector to lowest position to access steering column opening cover.
   Release the four clips and remove the steering column opening cover.

1. Remove the upper and lower steering column shrouds.
   1. Remove the three screws.
   1. Remove the lower steering column shroud.
   1. Remove the upper steering column shroud.

1. Remove the multi function switch.
   1. Remove the two screws.
   1. Disconnect the electrical connectors.
   1. Remove the multi function switch.

Installation

1. NOTE: When the battery (10655) is disconnected and reconnected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 mi) or more to relearn the strategy.
   To install, reverse the removal procedure.

Lights intermittent can be caused by switch or relay. Try swapping the Low Beam relay with another similar relay (horn relay is a good choice) to see if that resolves it. These relays are in the Junction Block--may be under the hood or in the car but not in the big box by the battery). If this doesn't fix it, the problem is likely the headlamp switch.

Horn coming on is usually caused by a broken switch or stripped wire insulation inside the steering column. You would usually have to take the steering wheel off to fix it, and this requires special tools; however, if the problem happens to be under the steering column shroud, you may be able to fix it without taking off the steering wheel. Take the shroud off and see if you can follow the black/red horn wire. Follow it as far as you can to check for stripped insulation contact with any metal. If you lights switch is bad, you can also change that while you have the shroud off.

Please let me know if you have questions.

Wand Removal & Installataion

1. Disconnect and isolate the battery negative cable.
2. Remove the knee blocker from the instrument panel.
3. Remove the three screws that secure the lower steering column shroud to the upper shroud.
4. If the vehicle is equipped with a standard non-tilt steering column, loosen the two upper steering column mounting nuts. If the vehicle is equipped with the optional tilt steering column, move the tilt steering column to the fully lowered position.
5. Remove both the upper and lower shrouds from the steering column.

Fig. Steering column shroud removal for the Cherokee

1. Remove the two screws that secure the multi-function switch water shield and bracket to the top of the steering column.
2. Remove the one screw located below the left multi-function switch control stalk that secures the multi-function switch water shield and bracket to the steering column.
3. Gently pull the lower mounting tab of the multi-function switch water shield bracket away from the steering column far enough to clear the screw boss below the left multi-function switch control stalk.
4. Lift the water shield and bracket with the left multi-function switch off of the left side of the steering column far enough to access the two instrument panel wire harness connectors for the left multi-function switch.
   NOTE If the vehicle is equipped with the optional tilt steering column, lifting gently upward on the tilt release lever will provide additional clearance to ease left multi-function switch removal.
   
5. Disconnect the two instrument panel wire harness connectors from the left multi-function switch connector receptacles.
6. Remove the left multi-function switch and water shield from the steering column as a unit.
7. Gently and carefully remove the water shield from the switch by pulling it over the hazard warning switch button and the left multi-function switch control stalk.
8. 
   

To install:

1. Gently and carefully install the water shield onto the switch by pulling it over the hazard warning switch button and the left multi-function switch control stalk.
2. Position the left multi-function switch and water shield near its mounts on the steering column as a unit.
3. Reconnect the two instrument panel wire harness connectors to the left multi-function switch connector receptacles.
4. Position the left multi-function switch onto its mounts on the left side of the steering column.
   NOTE If the vehicle is equipped with the optional tilt steering column, lifting gently upward on the tilt release lever will provide additional clearance to ease left multi-function switch installation.
   
5. Position the lower mounting tab of the multi-function switch water shield bracket to the steering column screw boss below the left multi-function switch control stalk.
6. Install and tighten the one screw located below the left multi-function switch control stalk that secures the multi-function switch water shield and bracket to the steering column.
7. Tighten the screw to 10 inch lbs. (1.1 Nm).
8. Install and tighten the two screws that secure the multi-function switch water shield and bracket to the top of the steering column [Tighten the screws to 20 inch lbs. (2.2 Nm)].
9. Position both the upper and lower shrouds onto the steering column.
10. Install and tighten the three screws that secure the lower steering column shroud to the upper shroud. Tighten the screws to 18 inch lbs. (2 Nm).
11. If the vehicle is so equipped, tighten the two nuts that secure the non-tilt steering column upper mounting bracket to the dash panel steering column support bracket studs. Tighten the nuts to 200 inch lbs. 22 Nm).
12. Reinstall the knee blocker onto the instrument panel.
13. Reconnect the battery negative cable.

The left turn cancel return spring has broken. It is part of the turn signal switch. In order to replace you will need to get a steering wheel puller kit, a couple of picks and a snap ring pliers. This will allow you to remove the steering wheel, airbag clock spring, the steering wheel lock plate. and the horn ring. After those are removed you will have access to the turn signal switch. You will see the two springs in the switch. One will definetely no look the the other. The springs can be purchased individually from you local GM dealer. Might as well replace both as long as everything is taken apart.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If the air conditioner compressor is seizing it could cause the vibration you experience.

does it work only one side or does not work at all? if neither side work then first try to check the fuse.
check the emergency lights to see if they are working, if not then check the flasher under the dash.
if the flasher work then it could be your multi-function switch.

The Computer Module(ECM) is located to the left of the steering wheel on the fire wall underneath the dash, you will have to lay on your back look up and to the left of the steering wheel. The (ECM) is a white box with a bunch of wires going out of it.

Hope helped with this.