Q: Why are my ABS and brake lights on

asked by on

The brake system kept getting hard and loose, then one day the front wheels looked up on us and now it hardly brakes when flooring. We see some wet spots near the master cylinder on the valves I think around the bolts. We have no way of taking it down the mountain so would like to know what we need to fix it? Thanks

My car has 264279 miles.
My car has an automatic transmission.

Your ABS light is on for a reason - and you have some scary symptoms that underscore that the problem is real. Your Suburban is a pre-OBD II model, so you either need a code reader capable of reading ABS codes on this truck, or you can extract them yourself. Take a paper clip, bend it so that one end goes in the "A" position of the Assembly Line Diagnostic Link (flat wire connector under the dash), and the other end of the clip goes in the "H" position. Turn the ignition to "On" only. The ABS light will start flashing a 2 digit code. Google search this code (GM ABS xx), which should provide some guidance on what’s wrong with your ABS. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Why are my ABS and brake lights on

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: ABS light comes on sporadically and the right rear suspension shock absorber is leaking.

Hello. Best first step would be to get an ABS scanner hooked up and extract the problem codes from the ABS system. This may be as simple as a malfunctioning wheel speed sensor. In N. America, this model (badged as...

Q: If my wheel cylinder is bad and i am replacing how many do i purchase for a 1998 chevrolet 2500

Hello, thank you for writing in. You can replace just one brake cylinder at a time. If one has failed, the others are likely just as worn and may follow suit shortly. If you are in a position to replace...

Q: Brake lights not working

The brake lights are turned on by the brake switch, and it then goes through the multifunction switch on the steering column. Both of these components have been causes of light failures on these vehicles. The only way to know...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.