Brake booster How do I repair a Brake Booster?  I have the kit but I need details of the steps to follow and if I need special tools. Thanks so much Juan Vasquez

When the brake booster light and brake light come on after replacing the batteries in a 2017 Isuzu NPR Diesel, it could indicate a problem with the brake system or a malfunctioning brake booster.
Here are some steps you can take to troubleshoot the issue:

1. Check the brake fluid level: Low brake fluid level can cause the brake booster light and brake light to come on. Open the hood and check the brake fluid level in the reservoir. If the level is low, top it up with the recommended brake fluid and check if the lights go off.
2. Check the brake system: Inspect the brake lines, brake pads, and brake rotors for any damage or wear. If the brake pads are worn out, replace them immediately.
3. Check the brake booster: The brake booster is responsible for increasing the force applied to the brake pedal. Check the brake booster for any damage or wear. If the brake booster is malfunctioning, it will need to be replaced.
4. Reset the brake booster light: If the brake booster light and brake light stay on even after checking the brake fluid level and inspecting the brake system, it may be necessary to reset the brake booster light. To reset the brake booster light, turn the ignition switch to the "on" position without starting the engine. Pump the brake pedal 3 times, then turn the ignition switch off. Start the engine and check if the lights go off.

If none of these steps work, it is recommended to take the vehicle to a certified mechanic or the nearest Isuzu dealership for a professional diagnosis and repair.

If it is like my 98 Silverado it is replaced with some degree of difficulty. I watched a video on you tube.

Step 1 - Locate the Brake Booster The brake booster is located adjacent to the master cylinder. There will be 4 mounting screws protruding through the booster. The booster is also attached to the brake pedal in the interior of the car. This is where you will start work in replacing the brake booster.
Step 2 - Remove the Brake Booster Start by locating the booster rod that goes through the firewall and is attached to the brake pedal on the interior of the car. Typically, there is a cotter pin that secures the rod to the pedal, but there may also be nuts. When removing any fasteners in the course of this job, make sure to retain the nuts, cotter pins, and various other fasteners as the new brake booster will not come with replacement fasteners.
Remove the fasteners, whether it is a cotter pin or nuts. Slide the rod off the brake pedal. Disconnect the vacuum brake line that connects to the booster. In the engine compartment, there are four bolts securing the booster to the master cylinder and firewall. Loosen and remove these nuts. Remove the nuts (there are usually 2 in addition to the 4 that have already been removed) that secure the brake booster to the master cylinder. Wiggle the brake booster away from the master cylinder. There is a seal between the two. You will need to keep this as the new part does not generally come with another one. Remove the brake booster.
Step 3 - Install the New Brake Booster Set the new brake booster on the four mounting screws. Tighten the nuts on the bolts to the master cylinder. Insert the push rod through the firewall. Start these by hand so that the threads are not ruined. Reattach the vacuum hose, then the nuts to the 4 mounting screws. Reattach the push rod to the brake pedal by whatever means it was originally secured with, whether by cotter pin or by bolts.
Step 4 - Bleed the Brakes You will need to bleed the brakes after replacing the brake booster

you will need the manual on this one , it has to be done right so as to not get air in thelines when completed

The following steps will help you to replace a Toyota Camry brake booster :
1 With the engine off, step on the brake pedal several times to relieve the brake booster of vacuum.
2 Press the brake pedal down and start the engine. Verify that the brake pedal sinks slightly. Turn off engine.
3 Remove the vacuum hose from the brake booster.
4 Remove the brake lines from the master cylinder. Remove the master cylinder from the brake booster. Plug the fittings to prevent brake fluid seepage.
5 Disconnect the brake pedal from the push rod.
6 Have an assistant hold the brake booster from inside the engine compartment. Remove the nuts that hold the brake booster to the firewall. These nuts are usually located under the dash on the interior of the firewall.
7 Remove the brake booster.
8 Install the new brake booster to the firewall. Tighten the mounting nuts.
9 Connect the push rod to the brake pedal.
10 Connect the vacuum hose to the brake booster.
11 Attach the master cylinder to the new brake booster and reconnect the brake lines.
.12 Bleed the brakes at the master cylinder.

Check the help link below and follow the procedure:----

How to replace Brake Power Booster?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-brake-power-booster.html

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Where is Power Brake Booster located on Car?

http://howtobyme.blogspot.com/2011/12/where-is-power-brake-booster-located-on.html

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How to Replace Power Brake Booster on 1996 GMC Jimmy?

http://schematicsdiagram.blogspot.com/2011/12/how-to-replace-power-brake-booster-on.html

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These will help.
Thanks.

remove first all the metal tube.. the check valve and hose connected to booster body.. this is on the engine area..catch all the fluid that goes out from the metal tube...now , in the driver side the brake pedal ..there is a rod locked to the arm of the pedal brake.. this rod is connected to the booster. once the rod is unlocked from the pedal arm . remove the nuts on the wall body where the booster is leaning on the wall body.. these nuts are partner of the bolts inside the booster.once these nuts are out the booster is ready to get out. To install do the opposite step by step.. and bleed the metal tube till the brake is functioning good if not go under the bleeder screws on each tire and do the bleeding procedure with someone pressing the brake pedal. hope this will do .

brake booster leaking vacuum

a defective master has just one common symptom, a soft sinking pedal.
Instructions Things You'll Need:

• Nose pliers
• Ratchet and socket
• Ratchet extension
• Slip joint pliers
• Wrench
• New cotter pin

Removing the Old Brake Booster
1. Step 1 Park your car in a safe place with enough room to work around the front and driver side of the vehicle.
   
2. Step 2 Locate the booster push rod connected to the brake pedal.
   
3. Step 3 Remove the cotter pin securing the booster push rod pin to the brake pedal using a pair of nose pliers.
   
4. Step 4 Release the push rod pin from the brake pedal and slide the push rod off the brake pedal.
   
5. Step 5 Unscrew the four mounting nuts off the brake booster studs using a ratchet, ratchet extension and socket. You should be able to see the four booster studs extending through the firewall, in front of the brake pedal.
   
6. Step 6 Disconnect the vacuum hose from the brake booster, working from the engine compartment. Use a pair of slip joint pliers.
   
7. Step 7 Remove the two nuts holding the brake master cylinder to the brake booster. Use a wrench or ratchet and socket.
   
8. Step 8 Separate the brake master cylinder from the booster just enough to make room for booster removal.
   
9. Step 9 Pull the brake booster off the firewall and remove it from the vehicle.
   Installing the New Brake Booster
10. Step 1 Set the new booster in place by sliding the push rod and four mounting studs through the mounting holes on the firewall.
    
11. Step 2 Slide the brake master cylinder flange over the two mounting studs on the brake booster.
    
12. Step 3 Start the two brake master cylinder mounting nuts by hand to avoid damage to the threads.
    
13. Step 4 Tighten the two brake master cylinder mounting nuts using a wrench or ratchet and socket.
    
14. Step 5 Connect the vacuum hose to the brake booster.
    
15. Step 6 Screw the four mounting nuts to the brake booster working from inside the vehicle. Start the nuts by hand to avoid damaging the threads.
    
16. Step 7 Tighten the four mounting nuts using the ratchet, ratchet extension and socket.
    
17. Step 8 Position the brake booster push rod over the brake pedal and slide the push rod pin.
    
18. Step 9 Install a new cotter pin to secure the booster push rod to the brake pedal
    

You don't need to remove the pedal to get the booster off,it just slides inside,so when the booster is unhooked it will just pull out.



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