The brake booster on a 1992 dodge ram 2500 does not work and there is a vacume line not connected and no diagram under the hood.It has a new booster if it is not vacume what could it be.

Hi Javier, Im AL the owner of Big As Auto Repair

Javier, ABS Module is located under the hood. It mounts to the side of the hydraulic brake system. Hope this helps and please visit my auto-repair website and check out the satisfied customers and give me a shout while your there. http://www.bigasautorepair.com/

under the hood, next to your brake booster, look inder the black cover and its printed there, hope that helps.

It sounds like you have a bad mastercylinder cause when you panic brake it doesn't have time to bleed through the valve in the cylinder but under normal braking your foot is on pedal longer in turn giving the fluid time to bypass the valve in the mastercylinder in turn the pedal going to the floor.

Any time your dealing with a 4x4 system the best start is at you front axle. Its primarily a vacuum leak so check to see if the 2 vac lines are hooked up (its good to check the electric connections.). When your 4 wheel drive is engaged and the motors running you should have vacuum at one or both of thee lines depending on if your in 4 hi or low .
If no vacuum at axle check the Vacum switchs(the plug with 4 vac lines) on top of the transfer case it will have 2 feed lines(grey & green) they conect in to the into the vacum harness on back of motor (passanger side). A vacum schematic is normally located on the raditor core support (right under the hood next to hood release)
Hope this helps

check for a vacume leak in the hose going to the brake booster,or a plugged line where hose connects to intake,if you find nothing the booster is faulty

Sounds like you have a major vacume leak, Chk. line going to break booster. Do you hear a loud hissing or whiseling noise either comming from under the hood or under the dash especily when you apply the break? If under dash could be bad break booster, if under hood still could be booster or a break in the vacume line from engine to booster.

Could be booster, chk. vacume from engine to booster, usely when that happends you have lost vacume to the booster, very seldom does the booster go out, I'am not saying they don't, its just seldom they do. Do you hear a hissing sound either from under the hood or under the dash above break peddel? If you do you got a major vacume leak,if you hear it comming from under the dash its the booster, if you just hear it under the hood its in the vacume line from engine to booster.

sound like you have a vacume problem . the brakes have vacume asistbooster , check the the vacume line and the valae at the vacume booster ,this is the big round canister behinde the master break cylinder
hope this is usefull

You have a big vacuum leak,,check all vacuum hoses and then replace or refitt as necessary

check 2 things first one is their is a plastic check valve that is inserted into the booster (under your hood) then goes to a vaccum line ,then to the engine, pull it out of the booster and check the valve it should be L - shaped. it might have a hole in it causing a vaccum leak. be carefull pulling it out not to break it just pull straight out. if that is ok put it back in. then your problem is going to be the brake booster the big black round case. sometimes the diaphram inside the booster rips causing a vaccum leak which causes a hard brake pedal and you have to stand on the pedal to stop. then you will have to repace the whole thing but not the master cylnder unbolt master cylder with the brake lines connected, the lines will give then disconnect brake pedal arm under dash inside of trk their should be 2 nuts or 4 buts under dash on inside of firewall near brake pedal then remove booster pulls out from under hood. there is not much to replacing them.