No brake lights

Step on the brake and if you have the mid (3rd )light on replace flasher relay and check flasher switch. Here is a guide and the brake light wiring diagrams so you can see how it works.

https://www.2carpros.com/articles/brake-lights-not-working

Check out the diagrams (Below). Please let us know what you find.

Yes, the steering wheel has to come off. Which means the air bag has to be dealt with as well as the clock spring in the top of the column/wheel.
1. Make sure the lever is in the center or the OFF position.
2. Disable the Supplemental Inflatable Restraint (SIR) system.

Caution: Refer to Battery Disconnect Caution in Service Precautions.

3. Remove the inflator module.
4. Remove the horn pad assembly.
5. Remove the horn switch.
6. Remove the steering wheel nut.
7. Use the J 1859-A in order to remove the steering wheel.
8. Remove the knee bolster.
9. Loosen the steering column bracket nuts.
10. Remove the two TORSO head screws from the lower column cover.
11. Tilt the cover down and slide the cover back in order to disengage the locking tabs. Lower the column cover.
12. Remove the two TORSO head screws from the upper column cover.
13. Remove the steering column lock set.
14. Remove the upper column cover.
15. Remove the two wire harness straps from the steering column wire harness.
16. Remove the Connector Position Assurance (CPA) retainer from the Brake Transmission Shift Interlock (BTSI).
17. Disconnect the steering column bulkhead connector from the vehicle wire harness.
18. Disconnect the gray and the black connectors of the switch from the column bulkhead connector.
19. Remove the two TORX head screws from the switch.
20. Remove the multifunction turn signal/hazard switch.
1. Install the multifunction turn signal/hazard switch.
1.1. Use a small blade screwdriver in order to compress the electrical contact. Move the multifunction switch into position.
1.2. Make sure the electrical contact rests on the canceling cam assembly.
2. Install the two TORX head screws on the switch.
- Tighten the screws to 6 Nm (53 inch lbs.).

Notice: Refer to Fastener Notice in Service Precautions.

3. Connect the gray and the black connectors of the switch to the column bulkhead connector.
4. Install the steering column bulkhead connector to the vehicle wire harness.
5. Install the connector and the CPA retainer to the BTSI.
6. Install the two wire straps on the steering column wire harness.
7. Install the upper column cover.
8. Install the steering column bracket nuts.
- Tighten the nuts to 30 Nm (22 ft. Lbs.).
9. Install the knee bolster.
10. Install the steering column cylinder lock set.
11. Install the two TORX head screws to the upper column cover.
- Tighten the screws to 1.4 Nm (12 inch lbs.).
12. Install the lower column cover.
13. Install the two TORX head screws to the lower column cover.
- Tighten the screws to 6 Nm (53 inch lbs.).
14. Make sure the lever is in the center or the OFF position.
15. Install the steering wheel onto the steering shaft.
16. Install the steering wheel nut.
- Tighten the steering wheel nut to 40 Nm (29 ft. Lbs.).
17. Install the horn pad assembly.
18. Install the horn switch.
19. Install the inflator module.
20. Enable the Supplemental Inflatable Restraint (SIR) system.

There is a diagram of the switch/column attached below

Hello, do the lower brake lites work ok? I'd have to check the voltage circuit to the upper brake lite. Splice 220 is a junction for several brake circuits, don't have location for that splice. I'd have to track circuit from the brake switch, white wire.

If the high mount center brake light is coming On -check and test the turn and hazard switch the bottom lights goes thru this switch

Recheck the brake switch adjustment and for power to it-

Have you checked to see if you have power to the brake light bulbs when stepping on the brakes?Also you mentioned trailer lights did you install diodes on your brake circuit?I have seen them fail and cause the same thing to happen.

Sorry I was having trouble logging into my online repair manual. Lets start form the beginning of the circuit. With the brake pedal pushed see if the white coming out of the switch has power?

Also while stepping on the brakes or just do this instead at the underhood fuse box see if the chmsl and veh stop fuse has power across both sides of those fuses while stepping on the brakes?

Do the turn signals work in the rear?

Now go to the brake switch see if the orange wire to the brake light switch has battery voltage to it?Also if the white wire coming out of the switch has battery voltage while stepping on the brakes?