More problems with my coupe

[220bhp]

I havent used my coupe for a while,went to start it,battery flat.Charged it up and the car was fine all day. two days later could not get into the car,central locking would not work,climbed in through boot,jumped started the car, fired it up, and the red brake warning alarm go's of,no power steering,topped it up and it was fine it took quite abit of fluid, so I must have a leak somewhere,but cant seem to find it.
The car ran fine after the top up but the brake warning light is still on all the time,and the central locking dose not work.
This morning battery flat again,so is it possible that these three problems are just coincedents
Or are they related in some way.
Any help would be appreciated.

[Greg_S]

Have you checked the fault/blink codes to see if any have come back?

Does the car have an immobiliser fitted?

[220bhp]

Greg,thanks for the reply.The car has a sigma alarm and the fob works both the central locking,and the alarm.
The car is a 3b so would it show any codes.

[Rusty]

Brake warning could just be the level switch in the cap, unplug the electrical connection the the cap and see - you migh just have to clean it up.

[220bhp]

Brake warning could just be the level switch in the cap, unplug the electrical connection the the cap and see - you migh just have to clean it up.

I have just that ,it was the plunger removed itself from the cap.The warning light has gone out now
I did notice what looked to be air bubbles when I took the cap of,not sure if thats normal.
The central locking still won't work but I can open the car from the passinger side with my spare key,and lockit again.

[220bhp]

Went for a drive today and yet another problem,ABS light suddenly came on and it was hard to corner on roundabouts etc. when I pulled in to a car park it was juddering on lock.
The abs light is on all the time and the problem is only there when you tu,
rn the wheel,no problems in a straight line,but the abs light is on all the time.
I checked the power steering level and it was fine.
I have now idea where to look next.

[220bhp]

Sorry about the shyt spelling, in to much of a hurry with my one finger,plus I am very pissed of with this car.Having spent a small fortune on the engine ,which pulls like a train at last,and now I have other issues that stop me from injoying the car,apart from showing a clean pair of heals to a couple of, move over your in my way bmw's,that was fun.But then the abs problem,and back to doom and clume.
I need to get this car running right,because when its good its real good,just not sure I can put up with problems,and I have had a few.
So help is needed ,and much appreciated yet again.

[Error404]

are you sure the alternator is charging properly? The ABS is one of the first things to drop out when there is not enough voltage in the system. Have you checked the belt tension?

Seeing as it doesn't like going round corners and is juddering on lock maybe you have a problem with the diff lock controller and it is randomly locking the diff on you which is also cutting the ABS out hence the ABS light?
Maybe unplug the diff lock controller under the rear seat and see if that makes a difference.

[simon20vq]

sized caliper causing fluid to boil and brake to drag, go for a spin and see if one wheel is hotter than the other or spit on the disc and see how hot they are.

[simons2]

Sounds very much like your diff lock is stuck on , it should disengage at 15 or 20 mph

[Monkeymagic]

id certainly test your alternator. as already said its one or the first lights to come on. however it also sounds like your diff lock on. and this Will disable your abs. as yours is 3b can you switch abs on or off with button ?

[UrS4boy]

Rear Diff Lock Info

Went for a drive today and yet another problem,ABS light suddenly came on and it was hard to corner on roundabouts etc. when I pulled in to a car park it was juddering on lock. The abs light is on all the time and the problem is only there when you turn the wheel,no problems in a straight line,but the abs light is on all the time....I have now idea where to look next.

As others have suggested your rear diff lock is stuck on somehow. Here is some info that should help you sort that one:

http://forums.quattroworld.com/s4s6/msgs/170940.phtml

[prj]

Flat battery - there is something draining it, or the battery is screwed and needs to be replaced. Can be diagnosed using a multimeter.
ABS light on - check diagnostics with a scan tool.
Fluid leak - can be diagnosed by looking where it leaks fluid - top it up, then rotate the steering lock to lock many times while stationary. The level should drop.

All these sound like normal faults on any other car, and not exactly hard to diagnose.

[LHD_Kid]

Seeing as it doesn't like going round corners and is juddering on lock maybe you have a problem with the diff lock controller and it is randomly locking the diff on you which is also cutting the ABS out hence the ABS light?
Maybe unplug the diff lock controller under the rear seat and see if that makes a difference.

I was thinking the same thing........
could be a dodgy switch, they are a little tempramental and quite complicated inside...

[jamie9048]

check the reluctor rings on the c.v. joints if they split they become indipendant of the joint and not turning in time with the drive shaft causing the abs to show fault corrosion is the cause of most spliting