Brake light on dashboard lights up sporatically; causes the cruise control to shut off.

I researched these codes and found the following suggestions.Has your vehicle gone into limp mode (i.e.-check engine light is on &/or vehicle isn't making its normal power output??) Check your transmission fluid with the engine warm and at idle and if it's low,fill it to the appropriate level.P0700 is normally set when the tcm detects a fault.This is a common fault code in this model.Low/dirty transmission fluid can cause two sensors inside the transmission to short out requiring you to replace them.P0571 is related to the brake/cruise control switch, which is connected to your brake pedal.This operates your brake lights and deactivates the cruise control when you step on the brake pedal to slow down/stop.Have someone verify your brake lights are working and also make sure they're not remaining on after the pedal is released as non functioning brake lights could cause an accident.If your cruise control is working,verify it is shutting off when you press the brake pedal down.If it's not shutting off,that could also be dangerous too just like no brake lights.If it's not shutting off,check the switch to make sure it hasn't been knocked loose from the pedal and check the wiring harness also to make sure it's still connected.Check any fuse for the cruise control and brake lights also.
If the transmission fluid is low and you top it off and if you correct any condition present with the cruise/brake light switch,clear the codes with a scanner or get AutoZone/Etc to do it for free to see if the codes clear and remain that way.

check all fuses!

cruise control module has failed. or if your brake lights are staying on, then brake light switch has failed and not allowing cruise to engage. Have someone stand behind truck and see if brakes are working properly, if not- replace brake light switch. if fine, then swap out cruise control module under hood.... prob find one at a junk yard.

Yes. The brake light switch has to be in good condition because it is one way to disable the cruise when driving.

CHECK TO SEE IF BRAKE LIGHT WORKING.BECAUSE BRAKE LIGHT SWITCH DEACTIVATE CRUISE CONTROL WHEN BRAKES APPLIED.MOST TIME IF YOU HAVE CRUISE CONTROL PROBLEMS FAULTY BRAKE LIGHT WILL CAUSE CRUISE CONTROL PROBLEMS.

07 sebring cruise light comes on but cruise does not work i have installed a new clock spring and now the horn works but no cruise control.

Your brakes warning light or your actual brake lights? If it is your warning light that can come Monday if you're park break is on or slightly on or the switch that says that it is on is faulty, in which case it may tell your cruise control to turn off. If your brake lights stay on there's something pul to you about your switch by the pedal as your cruise will not work when you hit the bricks and this will be perceived as you hitting the brakes. A break warning light will also, come on if your brake fluid is low.

I had same problem (cruise control/dashboard lights) for the past month with my 2000 Elantra. Replace the tail lights bulbs - my problem was caused by a problem with the double filament within the bulb. Essententially, there was a short when I turned on the lights or hit the brakes.

I did this last night and everything is working properly now.

hi poss one or both brake light bulbs filaments are touching causing a back feed note if the brake lights are on the cruise control is cancelled

the lights you have on are probably the brake lights. you need to check the brake light switch. it is probably stuck in the on position and that would cause the cruise to not function properly because the cruise automatically shuts off when you press the brake pedal.
hope this helps!