Brake shudder on ford focus diesel 2002.

THE REASON FOR SHUDDERING IS PROBABLY
STICKING CALIPER OR CALLIPERS,CALIPERS HOLD YOUR BRAKE SHOES ONTO BRAKING AREA ON WHEEL HUB.COULD BE EXTREMELY WORN BRAKE SHOE/SHOES,WHICH MEANS
WHEN YOU BRAKE ITS JUST METAL ON METAL AND IT GETS HOT HOT IT EXPANDS GRABS YOUR WHEEL BUT THEN SLIPS AS NO GRIP ON BRAKE SHOE..IF BRAKE DISCS RATHER THAN
BRAKE DRUM,IT COULD BE A WARPED BRAKE DISC.EITHER WAY I WOULD ADVISE YOU TO GET A PROFESSIONAL TO CHECK IT OUT,TELL HIM AS MUCH INFORMATION AS YOU CAN,THIS WAY HE CAN RULE CERTAIN POINTS.SAVING HIM TIME AND YOU MONEY..CURRENTLY YOUR BRAKES COULD FAIL ANYTIME..GENTLY DRIVE TO GARAGE AND GET IT DONE.
PLEASE.GOOD LUCK.MARK FROM SWANSEA

you mention replacing the discs/pads. how long ago? the fault described is usually caused by warped brake discs as you mention it comes on the onset of braking. i advice replacing the discs.

it sounds the switch has not been adjusted correctly the way is to start the engine then hold the brake pedal on with the new switch unlocked

You have a faulty abs censor.Have a diagnostic check done to see which one is at fault.Good luck.

Is the piston sticking in the caliper or is the caliper sticking on the outside slides preventing it from moving to the disc?

does it have abs if so if you brake hard it will shudder its normal if no abs then front disc rotors may need to be ground

i need a manual to learn how to take the ignition kit out from a 2001 grand cherokee

i wiried up my focus estate with the following no relays needed as the wiring is protected by the car fuses
pin 1.yellow/left hand indicator
pin 2.blue fog light
pin 3.white/earth
pin 4.right hand indicator
pin 5.brown/right hand tail light
pin 6.red/ brake lights
pin 7. black left hand tail light
connect these to the car wiring with scotch locks as follows/red/blue.right hand indicator/blue.left hand indicator,green/black,left hand indicator,red/green,right hand indicator,orange right hand light,orange and white,left hand lights, finally green/yellow fog light
hope this is of use to you all my lights are working and correct

factory immobiliser call dealer to reset ECU

It turned out that the bulbs in the headlights had gone simultaneously. Luckily my son is knowledgeable about cars. He came over and figured out the problem. I had to purchase new bulbs, then my son had to practically dismantle the front of the car to change the bulbs. It was a complicated operation just to replace bulbs, and something I would not have been able to tackle myself. If it had not been for my son. I would have had to spend a fortune at a garage for a mechanic to replace the bulbs for me. What should have been a relatively simple task has become a mammoth operation. In years gone by it would have been a simple task that I could have performed myself. Why do manufacturers design cars so that it is so complicated just to replace the bulbs. There are so many things that have developed faults on this Ford Focus, I will never have another one.