Most modern vehicles are equipped with an anti-lock braking system (ABS). The antilock braking system is a modern safety feature that greatly increases the effectiveness of the braking system, especially in adverse conditions. It works in such a way that the driver does not need any special intervention to achieve maximum braking potential.
The function of the antilock braking system is to allow the braking system to operate at its full potential, for a given system, and it does this by modulating the pressure in the braking system to allow the wheels to prevent them from locking hard. braking. An antilock braking system is especially useful during very hard braking events to avoid an accident, when roads are wet from rain, covered with snow, roads are icy, or on loose driving surfaces such as dirt or gravel.
The system intuitively, through a combination of sensors, electric servos / motors and control units, detects wheel lock and makes brake pressure corrections in a fraction of a second. The antilock system is designed to detect wheel lock, release enough pressure to allow the wheel to turn again, and maintain as much pressure as possible in the braking system without the driver having to make additional manual corrections.
When there is a problem with an antilock braking system (ABS), there is usually a red or yellow warning light on the instrument cluster to alert the driver that there is a problem within the system. There are several problems that cause the warning light to come on. If a sensor fails, there is a problem with a control unit or various other possibilities, these warning lights come on.
The modern vehicle employs several safety features. To protect the antilock braking system, in our case, it employs fuses and relays to protect the wiring and control units when there is an electrical problem. The purpose of this article is to cover how to replace the anti-lock brake fuse or the relay mounted in the under-hood fuse and relay box. This article will cover the general replacement and not a particular model.
- Warning: Please note that brake fluid is very caustic on any painted / finished surface and can damage these surfaces when they come in contact with each other. Brake fluid is water soluble in most standard types of brake fluid and is neutralized with water. If a spill occurs, quickly rinse the affected area with water, making sure not to contaminate the brake fluid that is still in the system.
Part 1 of 1: Replacing an Anti-Lock Brake Fuse or Relay
- Fuse removal tool
- Needle nose pliers
- Relay extractor pliers
- Screwdrivers set
Step 1: Locate the fuse / relay box under the hood. Open the hood and locate the fuse / relay box.
Manufacturers often label the box with the word “Fuse” or “Relay” on the lid, but not all will.
Step 2: Remove the fuse / relay box cover under the hood. The fuse / relay box cover is usually removed by hand.
Sometimes, however, a small screwdriver is needed to gently pry the retention tabs free.
Step 3: Identify the Anti-Lock Brake Fuse or Relay to be Replaced. Identify the anti-lock brake fuse or relay that needs to be replaced.
Most manufacturers provide a diagram on the cover of the under-hood fuse / relay box that shows the location and function of each fuse and relay located inside the box.
Step 4: Remove the correct anti-lock fuse or relay that needs to be replaced. Remove the anti-lock brake fuse or relay that needs to be replaced.
This is usually done by pinching them between your fingers and pulling them up and out or using the fuse removal tool supplied by some manufacturers. You may need to move them back and forth while pulling them or use a pair of needle nose pliers (optional relay removal pliers for a relay) to pull them out.
- Note: You can also use a small screwdriver to gently lift the fuse or relay out of position, as long as you are very careful not to make contact with the metal terminals on them. This can briefly cause additional problems.
Step 5: match the replacement brake antilock fuse or relay with the replacement one. …