When I am driving my warning light for hand brake comes on and it goes out then back and forth onoff. What causes this to happen?

When I had that problem with the emergency light it was the sensor for emergency brake
The abs and brakes sounds like you are loosing pressure in the system

not worked on a tractor before but principle must be the same as car,are the brake components in good condition as a worn brake lining/faulty brake servo could cause the hydralic fluid resevoir to suffer a back pressure that would make sensor light go off so i'd check the brake system and go from there

Are you sure it is for the parking brake ?
If the master cylinder is low on brake fluid the brake warning light will come on.

{: ) Check first if your brake fluid is low. Better top it up at maximum level. Look also for possible brake fluid leaks. It can also be a fluid sensor or wheel speed sensors at fault. If the warning lights persist, I suggest a scan tool vehicle check to effectively pinpoint the main cause of the warning light issue.

If the parking brake switch is not stuck and the fluid level is OK, try tapping on the fluid reservoir to see if the light flickers or goes off. (you need 2 people to do this) If it flickers or goes off then replace your fluid level sensor. (You may have to buy a complete reservoir or master cylinder depending on your car ) If this does not provide any results, then you may have an internal leak in your master cylinder or Antolock Hydraulic Control Module causing the Proportioning Sensor Switch to turn the light on. At this point. I would tow it to a shop and have the Antilock Control Module scanned to see why it has turned the light on and disabled your Antilock Brake System. I do not recommend driving the car at all until the RED brake warning lamp problem has been resolved. It is OK to operate the vehicle (cautiously) with the YELLOW Antilock brake lamp on.

Its faulty sensor for driver warning (control light and acustic) when is parkbrake switched up. For safety goes warning after move on. When stopped is warning out. Its VERY EASILY to repair

Check the brake fluid level if it is low it will turn the light on.

Check your owners manual under Warnings audible and see what things are listed to to cause a warning tone it could be a faulty seat beat buckle, to low brake pressure. You have options 1 have it checked 2 turn the radio up high 3 ignore it 4 trade in. Good luck with this decision.

hi this could be one of a couple of problems the first could be that the alternator isnt charging the battery properly unless you get the revs up then the lights go off. This is the usual problem
The second problem would be a bad earth that comes from the battery if this is the case then removing the earth wire where it comes from the battery and goes to the engine or chassis and then clean behind where this earth touches the chassis or the engine use something like sand paper to remove any corrosion then put the earth wires back on then check if you still have the problem.

Is the brake and battery warning light just one light or is their a light for the brake warning light and a seperate warning light for the battery.

As you say when you apply the brakes or signal these lights come back on then it is going to be a voltage problem it could even be that the battery needs replacing this will need to be tested.

The first thing you should do is get the battery and alternator tested as one of these or even both is often the cause of the problem you are having.

Let me know how you get on or if you have any problems or questions just give me a shout back ok