Question about 1999 Chevrolet Silverado 1500

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Abs brake keeps coming on

I need a diagram of the abs system so I know where the sensors are located.

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  • TripleTauto
    TripleTauto May 11, 2010

    what is the problem? motor runs all the time? or abs activates right before stopping?

  • mbeaudy May 11, 2010

    your abs sensors at the front are built in to the wheel hub, you can find there plugs on each of the lower control arms,,, haynes manuals are worth there weight in gold

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  • 37 Answers

The sensors are located at all four wheels. Follow the wiring from the back of the wheel. They are most likely intergrated with the bearing/hub assembly

Posted on Dec 06, 2008

  • Rick Gillis Dec 06, 2008

    Hope these help


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1 Answer

Why dose the abs brake light on dash come on when I am not braking


Open the fuse panel by pulling down on the fuse panel cover in the driver's side footwell.
Locate the fuse for the ABS sensor using the fuse diagram on the underside of the fuse panel cover.
Pull the fuse for the ABS using the fuse pullers in the fuse box.
Check the fuse for the ABS. If the fuse is broken or damaged in some way, then replace it with a new fuse of the same amperage. The ABS light could come on if there is a short in the system and it blows the fuse.
Turn the ignition to the "On" position but do not crank the engine. If the ABS light comes on, crank the engine. If it stays on for more than five seconds, there is a failure in the ABS system, and it needs to be serviced by a professional mechanic.
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Check Brake fluid level.

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ANTI-LOCK BRAKE SYSTEMS General Information Fig. 1: RWAL brake system diagram
Fig. 2:4WAL Component locations — except 1996 models
p>Fig. 3: 4WAL Component locations — 1996 models Fig. 4: Three sensor 4WAL brake system diagram — Except 1996 models
Fig. 5: Four sensor 4WAL brake system diagram — Except 1996 models
There are two basic types of anti-lock systems available for this vehicle; a Rear Wheel Anti-Lock (RWAL) brake system and 4 Wheel Anti-Lock (4WAL) brake system. The 4WAL system has two variations; a 3 sensor system and a 4 sensor system. The 2WD vehicles will be equipped with the 3 sensor system, but the AWD vehicles can be equipped with either. The systems are easily identified by looking at the rear wheels for a sensor harness. If there is a sensor harness and thus, rear wheel sensors, it is the 4 sensor system. If the vehicle is not equipped with a harness, it is the 3 sensor system. The 4 sensor system takes it speed references from each of the wheels. The 3 sensor system takes its speed references from each of the front wheels and the vehicle speed sensor located in the transmission (2WD) or the transfer case (AWD). The RWAL system components consist of the Vehicle Speed Sensor (VSS), the Electronic Control Unit (ECU), the isolation/dump valve and the Vehicle Speed Sensor Buffer (also known as the Digital Ratio Adapter). The ECU also receives signals from various brake switches. The 4WAL system components consist of the Electro-Hydraulic Control Unit (ECHU) valve (also known as the Brake Pressure Modulator Valve or BPMV), the wheel speed sensors, Vehicle Speed Sensor (VSS) on 3 sensor systems and the VSS Buffer. prev.gif next.gif

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The awd disable lights keeps coming on and when it does the anti lock and brake lights comes on as well


check the abs sensors their wiring and connections for damage or connection problems if good than need to have truck scanned most auto stores such as auto zone / advanced auto [check ur local area] offer this service for free the code will tell u what and where ur problem is so u can make repair ur abs sensors are tied into the awd system

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1 Answer

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Below is a diagram showing the location of the 4 ABS sensors. They attach to the top of the brake calipers. Best of luck on your repair and please post back with any questions or just to rate this solution. Thank you very much.
Greg


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Dec 04, 2008 | 1999 Chevrolet Silverado 1500

1 Answer

Anti lock brakes light


Good Day,

Usually that indicates bad ABS sensor or ABS component in the system. The quick fix is to locate the ABS fuse in your fuse panel, remove this fuse and abs is disabled. Your brake will function normal and it is safe to drive w/o abs until you can have it checked out, keep in mind you will lock you brakes under heavy braking conditions.

hope this helps

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2 Answers

ABS


Sounds like a bad ABS sensor in the system. The quick fix is to locate the ABS fuse in your fuse panel, remove this fuse and abs is disabled. Your brake will function normal and it is safe to drive w/o abs until you can have it checked out, keep in mind you will lock you brakes under heavy braking conditions.

hope this helps

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1 Answer

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Good Day,

That's usually caused by a bad abs sensor and/or wheel bearing. The quick fix is to locate the fuse box, on that it should be on left side of the dash, only accesable with the driver's door open. Locate the fuse for ABS and remove it, ABS is now disabled, this will trip the ABS light on the dash, also keep in mind you will lock your brakes under heavy braking conditions.


Hope this helps

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