I am sorry there needs to be more info.on this....are you saying when you have the flashers on and apply the brakes that the hazard lights go out??
Three psi single vehicle, four psi combination.
You need to check your brakes and rotors. Typically when the rotors go out it will make any car/ truck do that.
i guess wait for a while then it does not turn just go
Can and should are very different. Lifting a truck changes how the truck handles and performs, destroying the carefully designed balance of the truck. While it may be possible to lift it a foot, it will require changes to the drive train, steering, and brakes (at least), and should not be attempted without some very experienced help.
have your brakes checked
Brakes, wheel bearing.
Yes, that will work.
supposedly the proper gear for going down a hill in a semi is the same gear it would take to get up the hill. this came about years ago when trucks and braking systems were not as good as they are today. the reason for this being that the negine would keep you slowed enuff to control the truck if the brakes failed. remember that years ago semis did not have air brakes In my opinion it is still safer on long steep grades to select a low gear (possibly even lower than the gear that you ascended the hill in) to decend a grade. My reasoning is this. Even with air brakes the greatest majority of class 8 trucks in North America have drum brakes that when overheated by too much use expand the drum and lessen the stopping capacity of the brakes. If you constantly using the brakes while traveling downhill you degrade your stopping power until the drums cool again and return to their original size. If you decend a grade at a speed where your Jake brakes sustain your speed and you do not have to touch the service brake pedal in an emergency situation you have the full capability of your drum brakes to slow the truck.
This is just a secondary brake line in case something would happen to your primary line. Instead of bleeding the brakes with the bleeder valve, chock the wheels and slightly unscrew the fitting on the brake itself while a friend gently pumps the air out of the brakes. Make sure between each brake you top off your brake fluid. the bleeder is on the passenger side of the truck. use this to bleed both of the wheel cylinders. i have had to find out the hard way on my 1984 Mazda b-2000
while your vehicle is legally stopped or disabled on the highway or shoulder.
If you suspect something, get them checked. If you get vibration while applying the brakes, get them checked. If you get grinding noise from the brakes, get them checked.
Depending on the what type of car or truck could be the brakes or rotors low brake fluid, or the boot is open and its gone dry, wheel bearings. hope this helps