Left brakelight doesn't come on

Climb under the dash and look on the back of the brake pedal, brakelight switch will be on the back of the brake pedal arm halfway up the arm.

Look around in the floorboard and look for some fragments of rubber. If you see some fragments of rubber then the little piece of rubber that is attached to the back of the brake arm has probably fallen off. If the rubber piece breaks and falls off then the brakelight switch will stay on because it will be touching bare metal and grounding the switch making it stay on all the time.

And that seems to make sense because when you pulled back on the pedal the brakelights went
off. Because you pulled the pedal back until it was not making contact with the switch anymore.

And the tach problem is unrelated. And im not sure about whats wrong with the tachometer. But I would suspect the vehicle speed sensor is faulty.

Check the fuses..If ok ,,then most likely the signal switch..Your brake light circuit runs through the signal switch as well..Get someone to watch your brake lights to see if they come on..Now push the brake down and move your signal switch around and see if the brake light comes on intermittently..If so its definetly your switch

the cause is the brake light switch on the backside on top of the brake pedal. it is either out off adjustment or it needs replaced. this switch activates the brake lights when pushing on brake pedal. if it gets out of adjustment or sticks the brake lights will stay on because it does not cut voltage to brake lights. have a good day !!

suspect a bad brake light switch,on the brake pedal itself.the key need not be on when checking the brake light switch.but requires 2 people.one to insure the brake lights come on,one to push the brake. theres a switch on the brake pedal itself. look above the brake pedal pad that you push to apply the brakes. you will see a plunger that moves in and out,just to supply the current to the brakelights.if the plungers out of sync,it will not work. or it may only be stuck.or simply bad,if it moves and brake lights do not work. if the plunger works on visual inspection,and is plugged up,the switch is suspect to be bad. thank you,for choosing fixya.com!! SIMPLE SOLUTION,CHECK THE BRAKE LIGHT FUSE. IT MAY ONLY BE BLOWN. UNDER THE DASH ON DRIVERS SIDE CLOSEST TO YOUR LEFT FOOT WHEN APPLYING BRAKES. WITH FLASHLIGHT,CHECK FOR BLOWN BRAKE LIGHT FUSE. if this fails,check for blown brakelight bulbs. unlikely that both brake light bulbs blown at once! but not unusall. thank you for choosing fixya.com!!

there is a switch, like a push button, mounted to the brake pedal arm. i would look there next. they unplug from wiring and generally some type of snap/clip holds them onto the brake pedal arm. you will have to get down on the gournd and look up underneath the dashboard. a flash light could come in handy

First check fuse. If good go right to brakelight switch on top of brake pedal under dash. Check for power into switch pedal up. If you have power in, press pedal down you should now have power out. If not you need brakelight switch. If you do have power out you have corroded or broken wire from switch towards taillights. Usually back by rear wheels. Need to trace wire to where there is a problem.

There should be a switch under the brake pedal. This should opearate the brake lights. It is also not impossible for both the brakelight lightbulbs to blow at the same time.

Sometimes a trunklid slamming can break the filaments. Check the switch under the brake pedal first and remember to look at the backwindow light to see if it is working. The brake pedal switch is simple to install. The rear window light may work if the tailight wires are unplugged.

Check your sensor at the top of the brake pedal to ensure it is being activated when the pedal is pushed down with you hand, this is a common problem

When this happens the problem is most likely the multi-funtion switch aka turn signal switch. Check to see if the 3rd brakelight comes on when the brake pedal is pushed. If so replace the MFS. The 3rd brakelight in late 80's fords bypasses the turnsignal switch.

Hope this helps if this information is helpful please give me a good rating. Thanks , Randy

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