The brake rotors are warped. Someone tightened the lugnuts out of sequence. That compressed and torqued the rotors out of spec. Replace the from rotors and pads and the rear ones too, if necessary.
You should have someone pull off the hubs and check your bearings to see if they need to be replaced or just repacked
Warped rotors
Your AC should have NOTHING to do with your barking system, as it is not tied into the vacuum of the engine. If your wheel shakes under braking, then you need to replace your rotors and pads.
warped rotors, you probably had someone put on new tires with an inpact wrench and overtightened the lug nuts , this uneven tightening causes the rotors to warp giving a pulsating feel to the brake pedal and a thumping noise to the brakes.
maybe the car need to be linged up n check the power steering.
What are the causes and sources of vibration on diesel
This would normally be down to either: Warped Brake Discs (in some counties these are called Rotors) where there is a small ripple in the surface of the disc. This causes the brake pads (which are flat) to make intermittant contact with the surface which causes a vibration. This "warping" is not always visible to the naked eye. Worn or Perrished suspension compnents. This can lead to the wheels moving around in an unctrolled manner during braking which can also cause vibration.
All of the following causes mean you have a serious safety issue: Most comon is a bent brake rotor, but bent drums are also a suspect. Oil leaking onto the brakes can all cause this.
water/friction
noise and frequency are made a vibration
tires steel inner belt has shifted or separated
When one part of a vibration causes air particles to spread out, they form ararefaction