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Posted on Jul 03, 2017
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Hi i have a saab 93 1999 2lt se with both the brake and abs warning lights on, ive had new pads allround checked fluid level fuses connections to abs pump etc all ok checked connections on abs ecu all appear ok, could it be wheel sensors and would i need to change them all to rectify fault, speedo seems ok so dont think ecu fault and saab want around £150 to tell me fault no fix it and i dont really trust them, please help!!!!!!

1 Answer

Russ Hill

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  • Saab Master 4,057 Answers
  • Posted on Jul 03, 2017
 Russ Hill
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I know this may sound strange but remove the brake fluid cap. on the cap is a sensor, do this away from any other vehicle and yours and shack the sensor by the cap a good few times. as fast as you can. then re fit the sensor see if the lights go off. sometimes it works sometimes not. this just because the brake light is on, this only usually comes on when the sensor thinks there is low brake fluid. and it can also tell the abs as well. and this is why both the lights are on. also make sure the fluid is at full markings.

5 Related Answers

Anonymous

  • 231 Answers
  • Posted on Dec 24, 2008

SOURCE: BRAKE WARNING LIGHT

I dunno if this will work on your BMW, but on my BMW Z3 and M3, it was....

Turn the ignition key to position 2, but do NOT start the car. Wait for about 45 seconds and the brake warning message will be reset.

If it doesn't reset, then the brake sensor was damage. You will need to replace the brake sensor. It sounds like you replace the brake right after you saw the warning, so the brake sensor should be okay.

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Anonymous

  • 1 Answer
  • Posted on Feb 07, 2009

SOURCE: 2001 oldsmobile silhouette traction corntol is off and ABS light

I agree with the post about the tail lights. And the symptom about the brakes on when starting was also helpful. When I took off my rear tail lights and removed the top light bulb (top of the 4 is closest to connector) then repeat starting the car the problem is gone. I have a whole drawer of these bulbs that I removed, not because the filament was burned out, but because the base (similar to circuit card edge connector) had heat damage and melted. I am not sure exactly what the problem is but I think there are multiple conductors in the fixture which are too close or get moisture shorts. Anyway I hypothesize the circuit for daytime running lights is leaking current into the brake light circuit, and it causes that module that controls traction control and ABS to declare a fault. When you start with foot on the brakes the brake lamp is pulled on (I don't know if switches hi or lo) so that module doesn't declare the fault until you release the brakes.

I put in new bulbs and it works fine for now, but I know it may reappear some day then I will repeat, disassembly of the fixtures and inspect bulb bases for heat damage and clean out and replace. That is what did the trick for me.

Thanks Fixya and all contributors

Anonymous

  • 318 Answers
  • Posted on Jun 07, 2009

SOURCE: Yellow DSC and Brake light on... recently changed brake pads

Abs and dsc are related and with the light on these won't work. It is possible that you need to go back to where the work was done to look this over.

Anonymous

  • 119 Answers
  • Posted on Sep 17, 2009

SOURCE: golf mk4 sdi brake light problem??

What colour is this light.
The Golf mk4 sdi certainly should have brake pad wear sensors front and rear and the light on dash for this is orange with a similar symbol to what you describe.
The ABS light is orange with ABS printed on it
John

Anonymous

  • 1 Answer
  • Posted on Oct 01, 2009

SOURCE: ABS and brake fault warning

I has a clicking/knocking noise on one of my 407 (54 plate) front wheels after a change of brake pads. On investigation I found that the bracket to which the caliper hydraulic hose was fixed (at the lower end of the suspension strut) had been bent downward and was catching the CV boot clip. I bent it back up and the noise went. It is possible (if the brake caliper is not supported during pad change) to bend the bracket supporting the hydraulic hose. It could also interfere with the ABS wheel sensor bracket - check. Simply jack-up and support the car on the side with the noise and turn the wheel by hand to see what gives (don't go under the car until it is supported safely)..

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ABS/TCS lights on 2002 Honda Accord Coupe EX V6. Have high quality OBDII Scanner. Should the on board system report the problem to the scanner?

Only if the warning light showed on the dash...most often these abs sensors get clogged with brake dust or dislodged during wheel swaps if the pads are fine and fluid level correct...first check the brake pads then the disks and clean the sensors with an old toothbrush and reseat, also check the fluid level on the abs system.this should clear warning light.but any error codes stored on ecu need to be cleared using obd.
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I have a Mercedes c280 1996. My speedometer and odometer don't work along with abs. The abs light is on a long with the brake light on the dash. I have replaced the speed sensor and still isn't working?

hi i would check the abs module its located on the abs pump it controls the speedometer and can also bring lights on the dash eg abs &the brake warning light
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Brake warning lights

check brake fluid level.may be time for new pads/shoes
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The abs and safety brake light has come on. Is this a fuse problem

check your brake fluid level, brake system, wheel sensors. Dirty wheel sensors usually cause the ABS light to come on. As for the brake warning light, it may be low on fluid (possible leak) or faulty E-brake switch.
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Golf mk4 sdi brake light problem??

What colour is this light.
The Golf mk4 sdi certainly should have brake pad wear sensors front and rear and the light on dash for this is orange with a similar symbol to what you describe.
The ABS light is orange with ABS printed on it
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Driving down the road and my ABS warning light came on

check brake fluid level, brakes, if these are okay you may have a problem with the module.
this light can be caused by low levels in the brake resovoir fluid level and/or brake pads are thin.
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Abs light stays on.

Typically on this model along with Q45's there is a built in sensor system. The factory pads come with a sensor, so when the pads are installed there is a wired plug that must be connected to the sensor mounted on the behind the rotor. This was designed to give you a visual warning that the brake pads needed replaced. However since most aftermarket pads for this vehicle do not come with sensors, the connector is left unplugged and the circuit is open causing the light to stay on. Another thing is to check the brake fluid level. Often times as the pads wear the fluid level goes down a little. Once it reaches a certian point it will cause the light to come on as well. 
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Mini cooper Warning lights for abs, low tire,traction comes on

Ok, check the brake fluid level for a start. This could mean a few things. Your brake pads might be worn down, which would bring a yellow warning light on(triangle), at the same time with the pads being low it will have displaced the fluid, making the level low, this would be a red light on. Now because of this the body control module has detected these faults, will have turned the abs off, hence the abs light.
If brake fluid is low, this could confirm my theory.
If its low, top up with dot 5 brake fluid and take to garage to have new pads fitted.

TL
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Sensor Lights

Hi,

Based on your description, if it is red that would be the "Brake System" warning light. This warning light indicates that the hand brake or the park brakes are engaged. Alternately, this could also indicate that the level of the brake fluid in the reservoir is below nominal. Top off brake fluid if low and have your brake pads checked as well as visually inspect for any possible brake fluid leak.

On the other hand if it is yellow that would be the ABS (antilock brake system) Light. Momentary lighting up would be normal at startup but consistent light would indicate a malfunction in the brake system such as either low brake-fluid level, stuck brake caliper or faulty ABS. Check brake fluid level and have your vehicle's brakes checked.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.
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