Service brake booster warning light keeps coming and now truck will not crank.

SOURCE: Abs and parking brake lights come on and stay on

There is probably a problem with you anti lock brake system. Have it checked at your local dealership. Brakes are a problem that should never be let go.

John DeCosta

• 155 Answers
• Posted on Aug 11, 2009

SOURCE: BRAKE BOOSTER?

A bad brake booster will result in a hard brake pedal, stiff and more effort required to stop the truck. Here are my questions to you, first, you said you replaced the master cylinder, did you bench bleed it before you installed it? If not, there IS still air in it, regardless of how much you bleed the brakes at the wheels. Second, when you bled the brakes, after changing the calipers and master cyl., did you also bleed the proportioning valve? Sometimes air can get trapped in the valve, and its almost impossible to get it out bleeding just the wheels. And lastly, when the brake light comes on, does the abs light also come on with it? Air can also get trapped in the abs control module too.

SOURCE: battery not charging light and service brake

these are 2 separate problems

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ZJ Limited

• 17989 Answers
• Posted on May 07, 2010

SOURCE: CODE B0026 HOW DO i RESOLVE?

The airbag connectors in behind the front kick panels have high resistance. The fix is to replace them. Here is TSB's

#05-09-41-001B: Supplemental Inflatable Restraint (SIR) Light ON, Diagnostic Trouble Codes (Inspect/Replace IP Harness to Inflatable Restraint Module (Air Bag) Yellow 4-Way Connector C221 and/or C222) - (Jun 2, 2008)

Subject:
Supplemental Inflatable Restraint (SIR) Light ON, Diagnostic Trouble Codes (DTC) B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 (Inspect and/or Replace IP Harness to Inflatable Restraint Module (Air Bag) Yellow 4-Way Connector C221 and/or C222)

Models:
2003-2006 Cadillac Escalade Models
2003-2006 Chevrolet Avalanche, Suburban, Tahoe
2003-2007 Chevrolet Silverado (Classic Only)
2003-2006 GMC Yukon, Yukon XL, Yukon Denali, Yukon Denali XL
2003-2007 GMC Sierra (Classic Only)

This bulletin is being revised to add the 2007 model year for pickups and change a part number. Please discard Corporate Bulletin Number 05-09-41-001A (Section 09 -- Restraints).

Condition
Some customers may comment that the Service Supplemental Inflatable Restraint Light is on.

Diagnosis with a scan tool may indicate a DTC B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044.

Cause
The most likely cause of any one of the following DTCs: B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 is improper connection/high resistance in the IP harness to inflatable restraint module connector C221 and/or C222.

Diagnostic Information
DTC B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 will set when one of the following conditions occur:
• The SDM detects the air bag module deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.
• The SDM detects that the voltage at the air bag module high control is less than 2.4 volts and deployment loop resistance is 6 ohms or greater for 500 milliseconds.
• For additional diagnostic information, refer to DTC B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 in the appropriate SI Document.

Correction

DO THIS
Test for proper connection/high resistance at connector C221 and/or C222.

Don't Do This
DO NOT replace SIR system components prior to testing for proper connection/high resistance in C221 and/or for DTCs B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044.

Caution: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.

Important: The IP harness to inflatable restraint module connectors C221 or C222 is NOT located at the base of the steering column...
• C221 (4 Cavities) -- I/P Harness to Body Harness, behind the left kick panel
• C222 (4 Cavities) (w/o HP2) -- I/P harness to body harness, behind the right kick panel
• C222 (4 Cavities) (w/HP2) -- Behind the left side I/P access panel
• Refer to the Master Electrical Component List for additional location information.

1. Remove the appropriate side door sill plate.
2. Remove the appropriate side hinge pillar panel.
3. Locate the IP harness to inflatable restraint module yellow 4-way connector C221 or C222.
4. Inspect the IP harness to inflatable restraint module connector C221 or C222 for proper connection.
5. Disconnect and reconnect the IP harness to inflatable restraint module connector C221 or C222 THREE times.
6. Clear the DTC and road test the vehicle.
• If DTCs B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 DOES NOT reset, no additional repairs are necessary. Continue with step 10.
• If DTCs B0013, B0014, B0017, B0018, B0024, B0026, B0043, B0044 DOES reset, the most likely cause is high resistance in the IP harness to inflatable restraint module connector C221 or C222. Continue with the next step.
7. Replace the appropriate connector C221 and/or C222, P/N's 15306186 and 88987998. Refer to SIR/SRS Wiring Repairs (SI Document ID #325229).
8. Road test the vehicle and confirm that the repair is complete.
9. Install the driver's side hinge pillar panel.
10. Install the driver's side door sill plate.

Parts Information
Part Number: 15306186
Description: Connector (4-way Female, w/Leads) - Qty 1

Part Number: 88987998
Description: Connector (4-way Male, w/Leads) - Qty 1


Hope this help (remember comment and rated this help).

William Robinson

• 1547 Answers
• Posted on Dec 11, 2010

SOURCE: what does servicing the power brake booster

try checking brake fluid what type of car is it year model engine size