2015 FORD MUSTANG Exterior Lightingbrake Lightsswitch Problems

My break light switch pad is broken and is causing the car to not maintain speed and sluggish acceleration. I have seen other drivers report the same failure with their cars.

Traveling on highway using cruise control at posted speed limit. Approached slowdown due to accident and applied brakes. Accelerated to limit (manually) after passing accident. I was in middle lane. Vehicle abruptly began to decelerate. Continuous pressure on gas pedal did not increase speed, so I put on hazards and moved to slow lane. No failures on dashboard and quick scan through gages did not identify an issue. Re-applied pressure to gas pedal wanting to get to next exit. Car sped up, but when approaching 50 mph, it decreased again. Found that pumping gas would allow me to maintain highway speed. Pulled into truck stop at exit and turned car off. Message on console "Hill start assist not available". Let vehicle rest 15 minutes, added gas. Quick web search seemed to point to problem with ABS sensor. Seemed to drive ok in parking lot and road leading to highway ramp....

Brake light switch pad broke , So the car thinks the brakes are on so it goes into "limp mode" and it starts turning off assist modes.

The issue is the Brake Light switch stop pad on the brake pedal which is a rubber type of plug. At 70,000 miles the brake light switch stop pad cracked and fell into floor board (see pictures). When that happened, the RPMs dropped to idle speed and the car slowed down. After a few seconds, the car would pick up speed again only to repeat the event over and over again. I understand that when the brake light switch stop pad is missing and the plunger on the switch is fully out, the car thinks that you are applying the brakes. I was lucky, I was on a two lane road with no traffic, but I was headed to an inter-state with heavy traffic. Ford (nor does anyone else) does not sell just the rubber plug which fits on the brake pedal, but it will sell the complete brake pedal...

Brake pedal pad failed, causing car to suddenly brake even though brakes were not being applied. Ford Dealership recommended replacing brake light switch assembly. Brake lights stayed on even after the car was turned off. Had to disconnect the battery to prevent drain.

Plastic clip for brake light switch disintegrates over time, causing reduced power and inoperative brake lights.

The brake light switch function was inhibited due to the plastic retainer mounted on the pedal assembly. The plastic retainer had become brittle and caused it to come apart in pieces. The retainer acts a point of contact for the brake light switch plunger which signals to the ECM when the driver is applying or not applying the brakes. Symptoms of failure are constant illumination of rear brake lights with vehicle on or off. Disables cruise control. Also most importantly it limits throttle control by reducing throttle range spraticly. No driver warnings or lights are displayed or illuminated on the IPC. Problem has been verified and reproduced by independent service center.

A NON-CONDUCTIVE PAD IS INSTALLED BETWEEN THE BRAKE SENSOR SWITCH AND BRAKE ARM. THE PAD BECOMES BRITTLE OVER TIME AND BREAKS ALLOWING THE BRAKE SENSOR TO ENGAGE. THIS CAUSES THE CAR TO GO INTO 'LIMP' MODE WHICH CAN OCCUR WHILE DRIVING ON HIGHWAYS. THIS IS A SAFETY ISSUE SINCE IT OCCURS RANDOMLY AND CAN HAPPEN AT HIGH SPEEDS.

BREAK SWITCH PAD IS REALLY EASY TO BREAK. BREAK LIGHTS STAY ON AFTER CAR IS STOPPED AND IN PARK AND CUT OFF. WHILE DRIVING VERY DANGEROUS GET NO POWER TO SPEED UP AND WHEN YOU HIT THE GAS NOTHING.

MY BATTERY DIED AND REQUIRED A JUMP THE NEXT MORNING. WHEN I BEGAN DRIVING, THE CAR WAS THROTTLING DOWN AS I WAS ATTEMPTING TO ACCELERATE AS IF THE ENGINE WAS LOSING POWER. I DIDN'T FEEL SAFE DRIVING SO I RETURNED HOME AND NOTICE THAT MY REAR LIGHTS INCLUDING THE BRAKE LIGHT STAYED ILLUMINATED EVEN WHEN THE CAR WAS OFF. I HAD TO DISCONNECT THE BATTERY IN ORDER TO SAVE MY BATTERY FROM DRAINING AGAIN. AFTER SOME INVESTIGATING I FOUND THE BRAKE SWITCH PAD WAS BROKEN AND THIS IS WHAT WAS CAUSING THE BRAKE LIGHTS TO BE ON ALL THE TIME AND CAUSING THE LACK OF ENGINE POWER. THIS ISSUE WAS NOT ALLOWING THE CAR TO ACCELERATE BECAUSE THE THROTTLE IS OVER-RIDDEN BY THE BRAKES. THE CAR WAS THINKING THE BRAKE PEDAL WAS BEING PUSHED AT THE SAME TIME AS THE GAS PEDAL. THE BRAKE SWITCH PAD BREAKING AND CAUSING THIS...

THE BRAKE PEDAL STOPPER FAILED. THE BRAKE LIGHTS STAY ON ALL THE TIME, YOU ARE UNABLE TO ACCELERATE SAFELY. THIS IS A DRIVEABILITY AND SAFETY ISSUE AND POOR DESIGN. THIS OCCURED WHILE DRIVING ON STREET, WHEN I STOPPED IS WHEN I NOTICED THE BRAKE LIGHTS ON AFTER 15 MINUTES BEING STOPPED. I RESTARTED CAR AND ATTEMPTED TO ACCELERATE BUT UNABLE TO EFFECTIVELY. I HAD A VEHICLE FOLLOW ME AROUND BLOCK AND THE BRAKE LIGHTS WERE ON ALL THE TIME. HAD VEHICLE TRAILERED TO THE FORD DEALER FOR DIAGNOSIS AND REPAIR. THIS VEHICLE HAS ONLY 1857 MILES ON IT.

SUDDENLY STARTED EXPERIENCING A LOSS OF POWER AT HIGHWAY SPEEDS ONLY REMEDIED BY SLAMMING THE ACCELERATOR TO THE FLOOR WHICH THEN CAUSED THE CAR TO SURGE FORWARD. AFTER GETTING THE CAR HOME ALSO NOTICED THE REAR BRAKE LIGHTS WOULD REMAIN ON AT ALL TIMES. THE TWIN PROBLEMS ENDED UP BEING CONNECTED. TURNS OUT THERE IS A SMALL PLASTIC/CERAMIC PIECE IN THE BRAKE ASSEMBLY THAT FAILS AND BREAKS APART WITHOUT WARNING - ALSO NO DASHBOARD WARNINGS AFTER IT FAILS. CAUSES THE VEHICLE TO THINK THE BRAKES ARE BEING APPLIED AND CUTS THE POWER IN RESPONSE. THIS HAPPENED WHILE TRAVELING AT INTERSTATE HIGHWAY SPEED AND WAS AN IMMEDIATE SAFETY ISSUE. WAS TOLD BY THE DEALER THIS SMALL PART IS VERY SUSCEPTIBLE TO FLORIDA HEAT - UNFORTUNATELY THE WHOLE BRAKE ASSEMBLY HAS TO BE REPLACED.

VEHICLE WAS SITTING IN DRIVEWAY. MY HUSBAND RETURNED FROM AN ERRAND AND NOTICED MY VEHICLES BRAKE LIGHTS WERE ON WOULD NOT TURN OFF, EVEN WITH THE VEHICLE POWER OFF. I FOUND BROKEN PLASTIC PIECES ON THE DRIVER SIDE FLOORBOARD. WHEN I RESEARCHED THE PROBLEM, RESULTS SHOW THIS IS A BROKEN BRAKE LIGHT SWITCH PAD. MISSING THIS PIECE MAKES THE BRAKE LIGHTS REMAIN ON AND THE VEHICLE IS UNABLE TO ACCELERATE, CREATING A SAFETY HAZARD.

TL* THE CONTACT OWNS A 2015 FORD MUSTANG. THE CONTACT STATED WHILE DRIVING 70 MPH, THE VEHICLE WENT INTO LIMP MODE AND THE SPEED DECELERATED. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE CONTACT PARKED ON THE SIDE OF THE ROAD TO CREATE A TEMPORARY FIX TO DRIVE TO THE DEALER. THE VEHICLE WAS TAKEN TO AUTONATION FORD MOBILE LOCATED AT 901 EAST INTERSTATE 65 SERVICE RD S, MOBILE, AL 36606, (251) 202-2016, WHERE IT WAS DIAGNOSED WITH NEEDING RUBBER GROMMET BRAKE PEDAL TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 94,000.

THE PLASTIC BRAKE LIGHT SWITCH PAD LOCATED ON THE BRAKE PEDAL ARM DETERIORATED AND FELL APART. AFTER THE PAD WAS GONE, THE BRAKE LIGHTS WOULD NOT GO OUT. IT MAY ALSO AFFECT THE TRACTION CONTROL WHEN THE BRAKE LIGHT SWITCH STOPS WORKING.THIS IS A COMMON PROBLEM AFTER ABOUT FIVE YEARS. I NOTICED THIS DEFECT RIGHT AWAY, OTHERWISE THE BATTERY WOULD HAVE GONE DEAD. THE SPECIFIC PART IS NOT AVAILABLE FROM FORS SO THEY WANT YOU TO REPLACE THE WHOLE BRAKE PEDAL ASSEMBLY. THE NEW ONE HAS THE SAME DEFECTIVE PART INSTALLED. THIS IS A DANGEROUS DEFECT. IT IS ALSO VERY EXPENSIVE TO REPAIR.

THERE IS A SMALL PAD ON THE BRAKE PEDAL BETWEEN THE PEDAL SHAFT AND THE BRAKE LIGHT ACTIVATION SWITCH. THIS PAD SHATTERED INTO SMALL PARTS CAUSING MY BRAKE LIGHTS TO REMAIN ILLUMINATED EVEN WHEN I WASN'T BRAKING. THERE WAS NO WARNING PROVIDED BY THE CAR THAT THE BRAKE LIGHTS REMAINED ON. THE LIGHTS WERE ON WHEN DRIVING, WHEN PARKED WITH THE VEHICLE RUNNING OR NOT RUNNING. I BELIEVE IT BROKE WHILE DRIVING THE VEHICLE BUT I CAN'T BE SURE. THERE ARE MULTIPLE PADS WITHIN THE PEDAL CLUSTER ON THE CLUTCH AND OTHER PEDALS THAT ARE THE SAME PART AND MAY BE PRONE TO FAILURE. THE ATTACHED PHOTO INCLUDES THE BROKEN PART AND A PICTURE INDICATING THE EMPTY SPOT WHERE THE PART IS MISSING.

BREAK SENSOR PAD BROKE CAUSING LIGHTS TO ALWAYS STAY ON AND CAR TO BE IN LIMP HOME MODE

BRAKE LIGHT STOP PAD BROKE INTO MULTIPLE PIECES WHILE DRIVING, CAUSING THE BRAKE LIGHT SWITCH TO MALFUNCTION. BRAKE LIGHTS REMAINED ON EVEN WHEN PEDAL IS NOT DEPRESSED, WHICH CAUSES VARIOUS PERFORMANCE ISSUES DUE TO THE ECU BELIEVING THE BRAKE PEDAL IS BEING DEPRESSED. BRAKE LIGHTS REMAINED ON WHEN CAR WAS TURNED OFF.

WHILE DRIVING UP A HILL AND ATTEMPTING TO PASS ANOTHER VEHICLE, I BRIEFLY LOST ACCELERATION. THIS HAPPENED AGAIN A FEW MINUTES LATER, AND REPEATED A COUPLE MORE TIMES. I HAD NEVER EXPERIENCED THIS ISSUE BEFORE AND THERE WERE NO WARNING INDICATORS, OR ANY OTHER SIGNS OF MECHANICAL FAILURE. AFTER HAPPENING SEVERAL TIMES, LOSING ACCELERATION INTERMITTENTLY WITHOUT TAKING MY FOOT OFF THE GAS, A WARNING MESSAGE DISPLAYED "HILL ASSIST NOT AVAILABLE," AND THEN DISAPPEARED. NO OTHER WARNING MESSAGES OR DASH INDICATORS APPEARED, AND I COULD NOT FIND ANYTHING RELATING TO HILL ASSIST IN MY SETTINGS. AFTER PARKING AND SHUTTING OFF MY CAR, I NOTICED THE BRAKE LIGHTS REMAINED ON- I COULD NOT FIGURE OUT HOW TO TURN THEM OFF. I SEARCHED ALL OF THESE ISSUES AND FOUND A BLOG POST WRITTEN BY ANOTHER OWNER EXPERIENCING THE SAME ISSUES. THE OTHER OWNER FOUND SMALL FRAGMENTS OF A BROKEN PLASTIC DISC ON THE...

THE BRAKE LIGHT SWITCH PLUNGER BROKE OFF THE BRAKE PEDAL CAUSING THE BRAKE LIGHTS TO CONSTANTLY ILLUMINATE. THIS IS A SAFETY HAZARD FOR POOR DESIGN SUBSTANDARD MATERIAL. *TR

THE BRAKE STOP PAD SPONTANEOUSLY SHATTERED ON MY '15 FORD MUSTANG V6 WHILE DRIVING. THE CAR LOST POWER: WOULD NOT EXCEED APPROX 1500 RPM, THROTTLE UNRESPONSIVE, NO CHECK ENGINE LIGHT (MIL). I WAS DRIVING ON A TWO WAY ROAD AND SUDDENLY LOST POWER AS I WAS APPROACHING THE 75MPH SECTION FROM 55MPH. THE TRACTOR TRAILER BEHIND ME COULD HAVE REAR ENDED ME IF THEY WEREN'T PAYING ATTENTION. FORTUNATELY, WHEN THE PAD BROKE, THE BRAKE LIGHTS ILLUMINATED DESPITE NOT DEPRESSING THE BRAKE PEDAL. OTHER DRIVERS WERE AWARE THERE WAS A PROBLEM IMMEDIATELY BEFORE I TURNED ON THE HAZARD LIGHTS. WITH THE PAD BROKEN, THE TAIL LIGHTS WILL NOT TURN OFF EVEN AFTER ENGINE SHUTDOWN AND THE BUTTON-START IGNITION BYPASSED THE NEED TO DEPRESS THE BRAKES TO START THE ENGINE. IT IS DANGEROUS TO BE ABLE TO START THE ENGINE WITHOUT NEEDING TO ENGAGE THE BRAKES. MANY PEOPLE HAVE HAD THIS PROBLEM...

THE INCIDENT TOOK PLACE IN LAST SUMMER. MY BRAKE LIGHT SWITCH PAD BROKE INTO PIECES WHILE I WAS TRYING TO MERGE INTO A CITY HIGHWAY FROM A FREEWAY. SUDDENLY I COULD ONLY ACCELERATE FOR 2 SECONDS WHENEVER I STEP ON GAS, AND I ALSO NOTICED MY BRAKE LIGHT NEVER STOPS EVEN AFTER I TURNED MY CAR OFF. I ALMOST GOT INTO AN ACCIDENT AND GOT KILLED. THIS PROBLEM IS A VERY COMMON PROBLEM AMONG NEW MUSTANG MODELS AFTER 2015. FORD IS NOT DOING ANYTHING, AND THEY WOULD CHARGE YOU $200 FOR THE WHOLE BRAKE ASSEMBLY WHILE I ONLY NEEDED A 50 CENTS PLASTIC PAD. MY DAD IS A CAR MECHANIC, AND HE WAS SURPRISED THAT A CAR IN 2015 WOULD HAVE A SUCH COMMON PROBLEM IN 90S.

PAINT BUBBLE ON HOOD, REPLACED 3 RIGHT WINDOW MOTORS, LOW PRESSURE FUEL SWITCH, LITTLE PLASTIC BUTTON ON BRAKE LEVER DETERIORATES CAUSE BRAKE LIGHTS TO STAY ON CAUSING CAR NOT TO ACCELERATE PROPERLY. CAR ONLY HAS 39000 MILES ON IT!! WINDOW MOTOR, PRESSURE SWITCH AND BRAKE LEVER COST $2000.00 TO REPAIR. REALLY UPSETTING SPEND OVER $30000.00 FOR A AUTOMOBILE THAN WITHIN 39000 MILES AND I NEED TO SPEND THIS KIND OF MONEY.

MY WIFE NOTICE THE BRAKE LIGHTS WERE STUCK ONE. TIRED SEVERAL DIFFERENT STEPS TO SEE IF THE PROBLEM COULD BE REMEDIED. SUCH AS STARTING THE CAR, LOCKING UNLOCKING, NOTHING SEEM TO CARE OF THE ISSUE. AFTER DOING SOME RESEARCH ONLINE ON ONE OF THE MUSTANG FORUMS THERE WERE A FEW PEOPLE THAT HAD THE SAME ISSUE. IT SEEMS THAT THERE IS A LITTLE WHITE PLASTIC BUTTON ON THE BRAKE LEVER THAT DEPRESSES THE BRAKE LIGHT SWITCH. THIS SEEMS TO DRY AND CRACK AND FALL OFF THE PEDAL ASSEMBLY ,SEE ATTACHED PHOTOS. SO INSTEAD OF LETTING THE CAR SET ALL DAY AND DRAIN THE BATTERY I HAD MY WIFE DRIVE THE CAR HOME. ON THE WAY HOME SHE EXPERIENCED A RUNNING ISSUE THE CAR SEEM TO SHUTTER WOULD NOT GO ABOVE 30 TO 40 MILES AN HOUR. FORTUNATELY IT WAS ALL SIDE ROADS ON THE WAY HOME. IF THIS HAD HAPPENED...

THE STOP PEDAL PAD BROK AND THE BRAKE LIGHT WERE ALWAYS ON. THE CAR STOPPED BRAKING AT ALL SUDDENLY! I DID NOT CRASH BECAUSE THE LOSS OF BRAKING HAPPENED WHILE PARKING IN A LOW TRANSIT STREET. FIRTS THERE WAS LOSS OF ACCELERATION RANDOMLY IN A HIGHWAY. I FOUND THE PIECES OF THE BRAKE PEDAL PAD IN THE CAR FLOOR. THIS IS A SEVERE RISK FACTOR FOR CRASH BECAUSE WHEN THE STOP PEDAL PAD BRAKES THE CAR WILL NOT BRAKE SUDDENLY.

TL* THE CONTACT OWNS A 2015 FORD MUSTANG. WHILE OPERATING THE VEHICLE ON A BUSY HIGHWAY, THE SPEED WOULD NOT EXCEED MORE THAN 40 MPH AND THE REAR BRAKE LIGHTS REMAINED ILLUMINATED AT ALL TIMES. THE VEHICLE WAS TAKEN TO MULLINAX FORD (1210 N LAKE BLVD, LAKE PARK, FL) WHERE IT WAS DIAGNOSED THAT A SENSOR IN THE BRAKE PEDAL WAS FAULTY AND THE BRAKE PEDAL NEEDED TO BE REPLACED. THE BRAKE PEDAL WAS REPLACED AND THE FAILURE WAS REMEDIED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 30,000.

BRAKE LIGHTS WOULD NOT SHUT OFF AND STAYED ON STEADY SO PEOPLE BEHIND COULD NOT TELL WHETHER OR NOT I WAS BRAKING ....WHEN DRIVING CAR WOULD DROP SPEED FOR NO APPARENT REASON LIKE IT WAS GOING TO STALL OUT. I FOUND SMALL PLASTIC DEBRIE ON FLOOR MAT I GUESS IT WAS A WASHER TYPE THING FROM BRAKE SWITCH BRITTLE AND BROKEN IS PIECES? THIS ALL HAPPENED WHILE DRIVING.

A PLASTIC PAD ATTACHED TO THE BRAKE PEDAL ARM THAT'S REQUIRED IN ORDER FOR THE BRAKE LIGHT SWITCH TO OPERATE CORRECTLY APPARENTLY DISINTEGRATED. AS A RESULT, THE BRAKE LIGHTS WERE ON CONTINUOUSLY. I NOTICED IT WHEN ITHE CAR WAS PARKED AT HOME, BUT DO NOT KNOW WHEN IT HAPPENED.

WHEN DRIVING THE BRAKE STOPLIGHT SWITCH PAD THAT ATTACHES TO THE BRAKE PEDAL ASSEMBLY FAILS DUE TO IT BEING BRITTLE PLASTIC. THIS CAUSES THE ON BOARD COMPUTERS TO BELIEVE THE BRAKES ARE BEING APPLIED AND DRASTICALLY SLOWING THE VEHICLE DOWN FROM HIGHWAY SPEEDS TO LESS THAN 50MPH AND PREVENTING ACCELERATION. I WAS ACCELERATING TO INTERSTATE SPEEDS WHEN THE VEHICLE SUDDENLY FELT LIKE THE BRAKES WERE APPLIED. THIS REDUCED MY SPEED FROM 60 MPH TO 47-50MPH WITH TRAFFIC BEHIND ME. IT ALSO ILLUMINATED THE BRAKE LAMPS ON MY VEHICLE WHICH MADE IT APPEAR OTHER DRIVERS I WAS STOPPING ABRUPTLY. WHEN I CAME TO A STOP I COULD ACCELERATE UP TO 35-50MPH HOWEVER IT WAS INTERMITTENT ACCELERATION AS THE CAR WOULD LURCH FORWARD AND SLOW DOWN. MY BRAKE LIGHT WERE ON THE ENTIRE TIME CONFUSING OTHER DRIVERS. PIECES OF THE BROKEN BRAKE LIGHT STOP PAD WERE FOUND ON MY FLOORBOARD ONCE I...