Brake Warning Light-MOT Failure?

goldspanners

EcoR1 wrote: »

No, you think you know. You are in fact completely wrong. It's the work of a few seconds Googling to find out the answer.

come on then wheres your link you found in google?

i'll show you mine,just to save you the bother, read the parts about audible and visual warnings included in sections D and E.

EcoR1

Which applies to a low vacuum or air warning light on full power hydraulic systems or air and vacuum systems, when you're in a hole you really should stop digging.

Section A of that page shows you that there is no reason for rejection involving the brake pad/low fluid level/handbrake warning light.

Green.Lander

I have a A4 and this was on it was caused by a faulty brake sensor, it normally goes off after a few weeks. audi said they would need to replace all four therefore decided to live with this coming on/off but I recommend a quick look at the sensors for dirt etc

colino

You should of course double-check, or have someone else, double-check the brakes to make sure they are OK, but the warning light being on is NOT a fail. As has been said before the light is tripped for a variety of reasons on different cars and has no universal significance. The ABS light however must light and extinguish following the manufacturers self-check sequence.

goldspanners

EcoR1 wrote: »

Which applies to a low vacuum or air warning light on full power hydraulic systems or air and vacuum systems, when you're in a hole you really should stop digging.

Section A of that page shows you that there is no reason for rejection involving the brake pad/low fluid level/handbrake warning light.

as i mention in a much earlier post my car failed for having the brake warning light on,not an independant ABS warning light. ive found the fail note on the vosa website about my reason for failure, anit-lock braking system warning lamp indicates an ABS fault.(3.4.1.d)

now knowing the light on my car can mean anything is wrong witht the brake system (not just ABS) it failed,so im sure many other vehicles could fail for this.

colino

If you were failed for the red brake warning light being on and not the ABS light not following the ABS sequence then the tester got it wrong. Sometimes it happens.

surfer_blue

colino wrote: »

You should of course double-check, or have someone else, double-check the brakes to make sure they are OK, but the warning light being on is NOT a fail. As has been said before the light is tripped for a variety of reasons on different cars and has no universal significance. The ABS light however must light and extinguish following the manufacturers self-check sequence.

This is completely right

Abs Lights work on a standard and have to be checked to ensure they come on and then extinguish in the proper fashion, this shows the abs system is working
but other brake lights do not follow a standard, in this case if the warning light comes on ,it means differing levels of problems depending on the manufacturer, THEY ARE NOT CHECKED IN THE MOT, of course whilst the tester is checking your ABS light , him seeing a glaring brake light isnt going to make him feel confident about the state of your vehicle...which isnt a good thing, hence tht is why a mechanic might say "take the bulb out for the test" or similar.....saying that the warning light is there for a reason, it could be dusty sensors , it could be your brakes are worn low or a fe wother reasons, its warning you to get the system checked!!! but it isnt a reason to fail a car

http://www.motester.co.uk/CarOwnersGuidetoTheMOT/WhatIsTested.aspx

harveybobbles

Audi's put the pad warning light on when they are just under half worn, which is annoying.

This is why when the OP had their brakes cleaned, nothing was mentioned about thin pads/discs.

goldspanners

colino wrote: »

If you were failed for the red brake warning light being on and not the ABS light not following the ABS sequence then the tester got it wrong. Sometimes it happens.

i do not have an ABS light. the ABS uses the brake warning light to warn of a fault. hence failing for brake warning light as it could be warning of an ABS fault aswell as any other monitored part of the braking system.

EcoR1

goldspanners wrote: »

i do not have an ABS light. the ABS uses the brake warning light to warn of a fault. hence failing for brake warning light as it could be warning of an ABS fault aswell as any other monitored part of the braking system.

Every ABS equipped car had, when new, a seperate ABS light. If yours doesn't it's been tampered with. I'd get a professional to look at it.