You differentiate there is something amiss with the brakes on your machine, on the other hand you necessity to be informed before you catch it to a mechanic. You can see your brake transaction before you holding it to a mechanic.You van Testament most doable hog CD brakes on the front and may carry either CD or drum brakes on the rear. Whether you posses an older machine, you may acquire drum brakes on the front. Whether you admit a newer van you should accept two brake alert lights on the sprint.2. Assemble certain your emergency brake is off. Whether it is off, trial the brake fluid.
1. Research to distinguish provided the blush bright is on. Whether the cerise illumination is on, your emergency brake could be on, you could be low on brake fluid, or the brake switch could be bad.
One Testament be blood and one Testament be unethical. The treacherous lustrous is the ABS (automatic brake process) lustrous.
Instructions
Inspect a Brake System
Whether the brake fluid is filled and the emergency brake is off, you will need to probation for a wick proficient cylinder. Launch the van and push the brake pedal. Proceeds slightly, then push it again. Whether it goes to the floor or whether the brake pedal feels truly low, you most viable chalk up a complication with the proficient cylinder. Provided the brakes impression ok (they should not animation another than approximately partly to the floor), then you may get a pathetic brake aglow switch.3. Research to clock whether the chicken ABS ablaze is on. Provided the ABS ablaze is on, you compass a dispute with the ABS method. The ABS action is comprised of the ABS module, the determination module and sensors for the wheels. The ABS module is normally commence near the left fenderwell in the engine compartment. On some cars, it may be near the fly fenderwell in the engine compartment. You can make out the ABS module being it Testament obtain brake lines running to it. Provided you own four circle ABS, there Testament be eight brake lines going to the ABS module. If you have two wheel ABS, there will be four brake lines going to the ABS module. The control module is attached to the ABS module. The sensors are near the wheels. The two common types are a round smooth sensor with a wire attached to it and a round sprocket type sensor with a magnet. The magnet picks up a hall effect as the wheel spins. It senses the speed of the wheel. When you hit the brakes, if one of the wheels slow faster than the other wheels, the ABS system releases the brakes on the tire that is getting ready to lock up, then puts the pressure on the brake on that wheel again, therefore keeping the wheel from locking up.
4. Check the actual brakes pad, shoes, rotors, drums and wheel cylinders. Remove the wheels from the car. On the front, look inside the caliper at the brake pads. The thickness of front brake pads are about one half inch when they are brand new. This does not include the metal backing plate on the rear of the pads. If they are less then one quarter inch thick, you will need to replace the front brake pads.
5. Run your fingertips over the rotors. If the edges of the rotors are thicker than the inside of the rotor, you should have the rotors turned or replaced. Also, if the rotors have deep scoring, you should have them turned or replaced. The rotors will have a number on them, usually on the front of the rotor near the wheel studs. This will tell you the minimum thickness allowable for the rotors for your car. If they are too thin after turning, you will need to replace them. A thin rotor does not dissipate enough heat, and they could warp or cause your brakes to stick.
6. Check the rear brakes, if they have pads, the same way, except that the thickness of the rear brakes when they are brand new should be around 7/16 of an inch. If they look very thin, replace them.
7. If you have drum brakes in the back, you will need to remove the drums. If the drum is “sticking” and is difficult to remove, give it a couple of good whacks with a hammer, right in the center of the drum. Don’t pull the drum completely off at first. Pull it about half way off, and feel inside to see how close to the drum the brake shoes are. If they are very close – maybe a fingernail’s thickness from the rotor, they are most likely fine. If they are further than that away from the rotor, you can try to adjust them first. If they cannot be adjusted far enough you, you will need new brake shoes. The total movement the shoes should have inside the drum should not exceed about one eighth of an inch. You will also want to feel inside the drum for scoring. If there is scoring, replace the drum.
8. Check is the wheel cylinders. You will only have wheel cylinders if you have drum brakes. Gently pull back the rubber boot and see if there is any brake fluid leakage inside. If so, replace the wheel cylinders. You can also check for leakage inside the drum, or you may see drips on the inside of the tire.
