Question about 2000 Mercury Cougar

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Brake lights stay on

My br ake lights are staying on for my 2000 cougar how can i find brake switch light and how do i know if its good or bad ....and how can i know what to do to fix it.

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It is possible the wires going to the switch have shorted it is a common problems with ford and merc. cars around that time. You can follow the bar attatching the brake pedal to the car and up under the dash there will be a switch the bar hits on check the wires going to the plug if that is the problem the plug can be replaced. Hope that helps.

Posted on Jan 28, 2009


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Replaced the battery now the brake lights stay on. why?

Brake light switch is either defective or needs to be adjusted. Probably not related to the battery being replaced.

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at the risk of saying FSM, the book is free.
and the steps are clear as day, and is linked here.
if you want me to paste the words from a free book then ok, I guess we can do that."spoon fed sure"
possibles, switch bad, or not adjusted per book.
sorry had to say book. very sorry.
i know folks here hate books...
in the military we say, read the book yet?,
then hand it to the guy and point to brake chapter.
Please read it and ask questions we say.

so here it is,
the switch ,also has a jam nut and is calibrated, adjusted when installed. the FSM is free, and online and shows how to adjust it. here, ill post the link and page so you can see all steps.
it is common on this car for the nut to come loose and switch stick closed.
chapter 5 page 16 covers this 100%
no need to guess. at all.

to test the switch for bad.
key on.
remove switch. still wired per figure 13, id 509
if the switch center pin extends fully
and the lamps still glow the switch is for sure bad. (stuck closed or shorted it is...)

and if the pedal is not damaged or spring
this adjustment works, if not, not.
as they say first things, first.
it's just a pedal and 2 springs.
1 on pedal spring
and one inside the switch, must work.
all first things, that must work.

here is the switch with a real photo.
frame 14(clear photos or group restores them, many)

the clutch switch left and brake right.above,
another test is to unplug the switch
if the lamps go out, BINGO, switch bad or not adjusted right.

pedal not broken, sticking or jammed in any way or bent.
spring on pedal not broken?
pedal returns 100% to up position?
pedal pushes the switch plunger down.?
switch unplugged, lamp goes out.
it is just a simple switch, no magic electronics.
the switch must be calibrated per the page above.
besides the switch this is pure mechanics.
a lever. (pedaL) springs and a simple switch.

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I would check to see if the brake light switch is stuck.

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To reset the light, turn the key to position two and have the drivers door open for about 40 seconds, the light should automatically go off.. good luck.

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It sounds like the switch above your brake pedal may be bad. When you push on the brakes, the switch pops out activating the brake lights, and when the pedal comes up, it presses the switch de-activating them. I don't know if that switch is directly tied in with the saftey light, but that should solve the no brake lights problem. You may want to check your fluid. Even though you may have good brakes, they could be a little worn, and have lowered your fluid level. That would be a good starting point. If the ANTILOCK light is on with your BRAKE light, It sounds like one of your sensors may have gone bad. You can find them pretty cheap. Hope that helps.

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