Cruise control stop working can someone tell me how to fix myself

You could possibly have a "brake lamp switch" faulty in your vehicle. There is a recall on these for certain model vehicles. Your vehicle may think your brakes are on, which isn't allowing the cruise control to activate.
Also the new Hyundai's are manufactured that if the Engine light is on, your cruise control won't work.
But I would try the Stop Lamp Switch first.

Hope this helps.

first check to see if brake lights work, because brake light switch will deactivate cruis control when you press brake pedal to slow down stop.if brake light switch okay, dealership has to check out cruise control since pcm and vechicle speed sensor control the cruise control also.

going down steep hills will all but over ride a cruise control, since the motor is trying to keep the vehicle slowed to what your desired speed that you set , unfortunately this doesn't always work,, as your speed increases, the motor can't keep the speed reduced, when you apply the brakes, the system shuts off, cruise controls were meant to be used pretty much on long flat surfaces with Low inclines ,,

Check to see if your brake lights are staying on.
I thought my cruise control stopped working too, but realized that it would not work because the brake light control on the brake pedal was stuck.
I changed the $40 control and the cruise control works.

Your manual should tell you that. Also check your brake light switch by the brake pedal. It also disengages the cruise. If it is bad the cruise will not work but the brake lights may still work.

Have you recently had any brake work done? I had a 05' freestyle that did the same thing.. when you tap the brake the cruise kicks off right? so if your brake pedal is sticking or not returning fully to the up position, the cruise will immediately kick off like you applied the brake. Check to see if your brake lights are staying on when you release the brake. Let me know what happens, please and good luck.

Not enough information in your description of the problem. You start with "brake light still don't work after.... "??? after WHAT? Then you write .. 'and cruise control for a sonata 2000 2.4... etc." I'll take WILD GUESS... you have a brake lamp switch which is broken/malfunctioning. Please remember to RATE my response.

FROM LUSTY KID:

Check your bulbs first, I have lost both headlights on my ford at once on account of the bulbs burning out at the same time. Same thing probably happen, you have one filament out. The lights can work, but if the filament for brake is burnt, you don't see brake lights.

As for the cruise control. Check fuse box first. If OK check vacuum hose to actuator in engine compartment for starters.
Advise:

This works...the cruise is directly tied to the brake lights...when I replaced the brake and side light bulbs on my 2004 Santa Fe,,,the cruise started working with no other adjustments. It must complete a circuit or something.

I would check the easy things first. That is the brake switch and the clutch switch (manual trans). Drive down the road and pull the brake pedal up with your foot and then try to set the cruise (same with the clutch pedal). Also the cruise requires that the brake light bulbs be in working order (and that there are no LED brake lights). Check fuse numbers 53 54 and 59.
The high beam problem might be related to the cruise issue, but I can't think of a reason why.