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MOT regs abs warning lights
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CarGuru > Technology > MOT regs abs warning lights 7 May 2005 20:29:24

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MOT regs abs warning lights

Rob 3 May 2005 19:09:23
 whats the mot deal with these

the cavs just failed on the abs light staying on (as well as sky high
emissions)


anyone know the law when it comes to abs lights is it ok just to whip the
bulb out ?


Add comment
Timmmmayyy! 3 May 2005 19:30:53 permanent link ]
 Don`t know about the law, however abs will always fail safe, there is no
danger in having the abs not working.


"Rob" <finlayson1SPAMTRAP­@ntlworld.com> wrote in message
news:D­uMde.10630$l3­7.7351@newsfe4-gui.n­tli.net...> whats the mot deal with these>
the cavs just failed on the abs light staying on (as well as sky high> emissions)>
anyone know the law when it comes to abs lights is it ok just to whip the> bulb out ?>


Add comment
Depresion 3 May 2005 19:47:53 permanent link ]
 
"Rob" <finlayson1SPAMTRAP­@ntlworld.com> wrote in message
news:D­uMde.10630$l3­7.7351@newsfe4-gui.n­tli.net...> whats the mot deal with these>
the cavs just failed on the abs light staying on (as well as sky high > emissions)>
anyone know the law when it comes to abs lights is it ok just to whip the bulb > out ?

Well it should fail on that as well it depends on how visible the light is when
off. If you were to remove the light completely then it should pass but if they
notice a bulb out for it then it should fail.


Add comment
Chet 3 May 2005 19:55:04 permanent link ]
 timmmmayyy! wrote:> Don`t know about the law, however abs will always fail safe, there is> no danger in having the abs not working.>

One word, "bendix" I'm sure Dojj will verify that too ;)

--
Chet
www.retro-renault.c­om


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Ronny 3 May 2005 19:55:42 permanent link ]
 
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message
news:4277992a$0$566­$ed2619ec@ptn-nntp-r­eader03.plus.net...>­ Don`t know about the law, however abs will always fail safe, there is no> danger in having the abs not working.

The MOT tester normally looks at a list of cars and how the ABS should light
up, some stay on for 5 secs when you start car, some when you turn on
ignition, some stay on longer/shorter.

Just take the bulb out and hope for the best, although you should not have
bought it with the ABS light lit all the time.

It will be a faulty sensor I would imagine.

If the car is old enough, I doubt the tester will even know it has ABS


Add comment
Rob 3 May 2005 22:45:15 permanent link ]
 its a 1995 Cav sri 16v eco tec thingy quite nice too


failed the mot on emissions(no cat no silencers)
and the abs is the other biggy rest is easy sorts beam alignment and a cv
boot

in regards to the abs does removing the bulb from the dash(retro cool 80's
digi dash) and taping over the abs logo constitute removing it?

got a couple of sensors to swops over and try see how it goes else its being
removed

is it ok to retro remove abs from a car????


Add comment
LordyUK 4 May 2005 00:16:26 permanent link ]
 
in regards to the abs does removing the bulb from the dash and > taping over the abs logo constitute removing it?

Just remove the bulb, you'd be /very/ unlucky to get caught out by a
garage monkey failing you on the lamp not lighting up for pre-test.

A thought tho, does it have SRS... ? If so, just wire the ABS bulb up
to the SRS light, so that both lamps come on for the airbag pre-test :)­






--
Lordy.UK
Add comment
Timmmmayyy! 4 May 2005 02:55:19 permanent link ]
 
"Chet" <chet@eircom.net> wrote in message
news:d586t1$9i1$1@r­eader01.news.esat.ne­t...> timmmmayyy! wrote:> > Don`t know about the law, however abs will always fail safe, there is> > no danger in having the abs not working.> >
One word, "bendix" I'm sure Dojj will verify that too ;)>

As found in older fords?
It is beacuse the servo action is via a pump.
On the vaux (bosch) the brakes are sperate from the abs function. Any
failure and normal braking occurs.


Add comment
Chet 4 May 2005 04:05:54 permanent link ]
 
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message
news:42780155$0$564­$ed2e19e4@ptn-nntp-r­eader04.plus.net...>­
"Chet" <chet@eircom.net> wrote in message> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...> > timmmmayyy! wrote:> > > Don`t know about the law, however abs will always fail safe, there is> > > no danger in having the abs not working.> > >
One word, "bendix" I'm sure Dojj will verify that too ;)> >
--> > Chet> > www.retro-renault.c­om> >
As found in older fords?> It is beacuse the servo action is via a pump.> On the vaux (bosch) the brakes are sperate from the abs function. Any> failure and normal braking occurs.>

Older fords, renaults and some pugs i think. Its just your statement "there
is no danger in having the abs not working." can be a little misleading :)­


Add comment
Jb 4 May 2005 04:08:52 permanent link ]
 
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message
news:42780155$0$564­$ed2e19e4@ptn-nntp-r­eader04.plus.net...>­
"Chet" <chet@eircom.net> wrote in message> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...>> timmmmayyy! wrote:>> > Don`t know about the law, however abs will always fail safe, there is>> > no danger in having the abs not working.>> >
One word, "bendix" I'm sure Dojj will verify that too ;)>>
As found in older fords?> It is beacuse the servo action is via a pump.> On the vaux (bosch) the brakes are sperate from the abs function. Any> failure and normal braking occurs.

and older teeves systems....




Add comment
DervMan 4 May 2005 10:22:32 permanent link ]
 "Rob" <finlayson1SPAMTRAP­@ntlworld.com> wrote in message
news:%EPde.16512$Y4­6.7369@newsfe1-win.n­tli.net...> its a 1995 Cav sri 16v eco tec thingy quite nice too>
failed the mot on emissions(no cat no silencers)> and the abs is the other biggy rest is easy sorts beam alignment and a cv > boot>
in regards to the abs does removing the bulb from the dash(retro cool 80's > digi dash) and taping over the abs logo constitute removing it?>
got a couple of sensors to swops over and try see how it goes else its > being removed>
is it ok to retro remove abs from a car????


Yeah it's fine. A few of the Ka Klub Muppets did it, but they were Muppets
before they removed ABS, heh...

--
The DervMan
www.dervman.com


Add comment
Guest 4 May 2005 13:43:27 permanent link ]
 Apparently on date Wed, 4 May 2005 01:05:54 +0100, "Chet"
<usenet@retro-renau­lt.com> said:
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message>news:427801­55$0$564$ed2e19e4@pt­n-nntp-reader04.plus­.net...>>
"Chet" <chet@eircom.net> wrote in message>> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...>> > timmmmayyy! wrote:>> > > Don`t know about the law, however abs will always fail safe, there is>> > > no danger in having the abs not working.>> > >
One word, "bendix" I'm sure Dojj will verify that too ;)>> >
-->> > Chet>> > www.retro-renault.c­om>> >
As found in older fords?>> It is beacuse the servo action is via a pump.>> On the vaux (bosch) the brakes are sperate from the abs function. Any>> failure and normal braking occurs.>>
Older fords, renaults and some pugs i think. Its just your statement "there>is no danger in having the abs not working." can be a little misleading :)­

There's also some cars where they use the ABS to define brake balance front to
rear. The reason to have a front/rear brake balancer gadget is because without
one, when you brake hard, the rear tyres lose grip compared to the front tyres
due to weight transfer and the car will swap ends and slide backwards into the
future.

So there's a valve that makes the back brakes work much less hard than the
front to avoid this happening, properly set up the front tyres will lock up
before the rear tyres do and the car may end up skidding, but it will do it in
the forwards direction.

With ABS, though, the wheels shouldn't ever lock up so you might as well not
bother with a front/rear balancer and just use the ABS to prevent rear lockup.
For a start, you don't want the rear tyres to be taking it easy when they could
be braking fully to their limit, which on a non ABS with a balancer should
never be the case.

Anyway, when the ABS system works in this fashion, if it fails, there is no
front-rear bias system and whenever you brake hard, the back end will step out
and cross the other carriageway, leaving you pointing in the wrong direction.

Not all cars with ABS do it that way, though, I would generally find out
somewhere safe before assuming it is either safe or dangerous with the failed
ABS.


Add comment
Timmmmayyy! 4 May 2005 14:16:26 permanent link ]
 
<Questions@forgotte­n.what.this.was.now.­com> wrote in message
news:mr5h719baim8tf­jhl5ch63ecamhc8r3oag­@4ax.com...> Apparently on date Wed, 4 May 2005 01:05:54 +0100, "Chet"> <usenet@retro-renau­lt.com> said:>
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message> >news:42780155$0$56­4$ed2e19e4@ptn-nntp-­reader04.plus.net...­> >>
"Chet" <chet@eircom.net> wrote in message> >> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...> >> > timmmmayyy! wrote:> >> > > Don`t know about the law, however abs will always fail safe, there
no danger in having the abs not working.> >> > >
One word, "bendix" I'm sure Dojj will verify that too ;)> >> >
--> >> > Chet> >> > www.retro-renault.c­om> >> >
As found in older fords?> >> It is beacuse the servo action is via a pump.> >> On the vaux (bosch) the brakes are sperate from the abs function. Any> >> failure and normal braking occurs.> >>
Older fords, renaults and some pugs i think. Its just your statement
"there> >is no danger in having the abs not working." can be a little misleading
:)­>
There's also some cars where they use the ABS to define brake balance
front to> rear. The reason to have a front/rear brake balancer gadget is because
without> one, when you brake hard, the rear tyres lose grip compared to the front
tyres> due to weight transfer and the car will swap ends and slide backwards into
future.>
So there's a valve that makes the back brakes work much less hard than the> front to avoid this happening, properly set up the front tyres will lock
before the rear tyres do and the car may end up skidding, but it will do
it in> the forwards direction.>
With ABS, though, the wheels shouldn't ever lock up so you might as well
bother with a front/rear balancer and just use the ABS to prevent rear
lockup.> For a start, you don't want the rear tyres to be taking it easy when they
could> be braking fully to their limit, which on a non ABS with a balancer should> never be the case.>
Anyway, when the ABS system works in this fashion, if it fails, there is
front-rear bias system and whenever you brake hard, the back end will step
and cross the other carriageway, leaving you pointing in the wrong
direction.>
Not all cars with ABS do it that way, though, I would generally find out> somewhere safe before assuming it is either safe or dangerous with the
failed> ABS.>

The vaux in question uses a bias valve.
I dout any manufactur will not produce a car without a bias valve as fail
safe is very important with anything to do with brakes.
It might not be set up as conservately though, on abs models!


Add comment
Chet 4 May 2005 14:54:42 permanent link ]
 timmmmayyy! wrote:> <Questions@forgotte­n.what.this.was.now.­com> wrote in message> news:mr5h719baim8tf­jhl5ch63ecamhc8r3oag­@4ax.com...>> Apparently on date Wed, 4 May 2005 01:05:54 +0100, "Chet">> <usenet@retro-renau­lt.com> said:>>
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message>>> news:42780155$0$564­$ed2e19e4@ptn-nntp-r­eader04.plus.net...>­>>>
"Chet" <chet@eircom.net> wrote in message>>>> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...>>>>> timmmmayyy! wrote:>>>>>> Don`t know about the law, however abs will always fail safe,>>>>>> there is no danger in having the abs not working.>>>>>>
One word, "bendix" I'm sure Dojj will verify that too ;)>>>>>
-->>>>> Chet>>>>> www.retro-renault.c­om>>>>>
As found in older fords?>>>> It is beacuse the servo action is via a pump.>>>> On the vaux (bosch) the brakes are sperate from the abs function.>>>> Any failure and normal braking occurs.>>>>
Older fords, renaults and some pugs i think. Its just your>>> statement "there is no danger in having the abs not working." can>>> be a little misleading :)­>>
There's also some cars where they use the ABS to define brake>> balance front to rear. The reason to have a front/rear brake>> balancer gadget is because without one, when you brake hard, the>> rear tyres lose grip compared to the front tyres due to weight>> transfer and the car will swap ends and slide backwards into the>> future.>>
So there's a valve that makes the back brakes work much less hard>> than the front to avoid this happening, properly set up the front>> tyres will lock up before the rear tyres do and the car may end up>> skidding, but it will do it in the forwards direction.>>
With ABS, though, the wheels shouldn't ever lock up so you might as>> well not bother with a front/rear balancer and just use the ABS to>> prevent rear lockup. For a start, you don't want the rear tyres to>> be taking it easy when they could be braking fully to their limit,>> which on a non ABS with a balancer should never be the case.>>
Anyway, when the ABS system works in this fashion, if it fails,>> there is no front-rear bias system and whenever you brake hard, the>> back end will step out and cross the other carriageway, leaving you>> pointing in the wrong direction.>>
Not all cars with ABS do it that way, though, I would generally find>> out somewhere safe before assuming it is either safe or dangerous>> with the failed ABS.>>
The vaux in question uses a bias valve.> I dout any manufactur will not produce a car without a bias valve as> fail safe is very important with anything to do with brakes.> It might not be set up as conservately though, on abs models!

The renaults have the same bias valves, with or without abs. Its normally
seized solid tho, which is nice way to fail the test.

--
Chet
www.retro-renault.c­om


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Fishman 4 May 2005 15:19:43 permanent link ]
 The bias valves, when they fail, transmit almost no braking to the
rears so they in effect fail safe also.

Add comment
Guest 4 May 2005 15:32:50 permanent link ]
 Apparently on date Wed, 4 May 2005 11:16:26 +0100, "timmmmayyy!"
<timmmmayyy@nospamp­lease.com> said:
<Questions@forgott­en.what.this.was.now­.com> wrote in message>> Apparently on date Wed, 4 May 2005 01:05:54 +0100, "Chet">>
is no danger in having the abs not working." can be a little misleading>>
There's also some cars where they use the ABS to define brake balance>>
Not all cars with ABS do it that way, though, I would generally find out>> somewhere safe before assuming it is either safe or dangerous with the>failed>> ABS.>>
The vaux in question uses a bias valve.

Most do, my Ford does. But it's not always so.
I dout any manufactur will not produce a car without a bias valve as fail>safe is very important with anything to do with brakes.

Well, I learned this was possible when I read the handbook on sommat, Audi A8 I
think it was, where they made this point about the ABS on that car.
It might not be set up as conservately though, on abs models!

Not really had the chance to experiment on the Ford, on my TR7 the back drums
aren't doing a lot of work as the balancer is quite pronounced. I wonder if
there is any point in making it less conservative? The ABS would kick in on the
front and the rears would then grip gradually more as the pressure was
increased still further, which might be a good thing.

Add comment
Chris B 5 May 2005 04:58:00 permanent link ]
 
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message
news:4277992a$0$566­$ed2619ec@ptn-nntp-r­eader03.plus.net...>­ Don`t know about the law, however abs will always fail safe, there is no> danger in having the abs not working.

A mate of mine had a Vauxhall Calibra with a VERY odd ABS malfunction...

In the wet (at least it seemed to happen to him in the rain), if the ABS
kicked in, the brakes would simply release and not re-apply. I'm serious -
it'd only happen if he locked a wheel. Totally weird and I don't know the
cause - but, at least in this case, the ABS definately did not fail safe.

Chris.
"Rob" <finlayson1SPAMTRAP­@ntlworld.com> wrote in message> news:D­uMde.10630$l3­7.7351@newsfe4-gui.n­tli.net...>> whats the mot deal with these>>
the cavs just failed on the abs light staying on (as well as sky high>> emissions)>>
anyone know the law when it comes to abs lights is it ok just to whip the>> bulb out ?>>


Add comment
Gareth A . 6 May 2005 20:07:44 permanent link ]
 On Wed, 4 May 2005 01:05:54 +0100, "Chet" <usenet@retro-renau­lt.com>
wrote:
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message>news:427801­55$0$564$ed2e19e4@pt­n-nntp-reader04.plus­.net...>>
"Chet" <chet@eircom.net> wrote in message>> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...>> > timmmmayyy! wrote:>> > > Don`t know about the law, however abs will always fail safe, there is>> > > no danger in having the abs not working.>> > >
One word, "bendix" I'm sure Dojj will verify that too ;)>> >
-->> > Chet>> > www.retro-renault.c­om>> >
As found in older fords?>> It is beacuse the servo action is via a pump.>> On the vaux (bosch) the brakes are sperate from the abs function. Any>> failure and normal braking occurs.>>
Older fords, renaults and some pugs i think. Its just your statement "there>is no danger in having the abs not working." can be a little misleading :)­

Yeah, a colleague had a Pug 405 Mi16 and the Bendix unit failed. He
ended up taking a sharp corner very very fast and was lucky to keep it
on the road.

It was going to cost quite a few hundred even for a recon unit so it
was eventually sold to somebody who needed the engine for a transplant
into a Mini or something..

Gareth
Add comment
DervMan 7 May 2005 12:30:38 permanent link ]
 "Gareth A." <gareth@nospampleas­e-attrill.co.uk> wrote in message
news:ke5n715fk3inqr­mc25tv26gbur52gp8e39­@4ax.com...> On Wed, 4 May 2005 01:05:54 +0100, "Chet" <usenet@retro-renau­lt.com>> wrote:>
"timmmmayyy!" <timmmmayyy@nospamp­lease.com> wrote in message>>news:42780­155$0$564$ed2e19e4@p­tn-nntp-reader04.plu­s.net...>>>
"Chet" <chet@eircom.net> wrote in message>>> news:d586t1$9i1$1@r­eader01.news.esat.ne­t...>>> > timmmmayyy! wrote:>>> > > Don`t know about the law, however abs will always fail safe, there >>> > > is>>> > > no danger in having the abs not working.>>> > >
One word, "bendix" I'm sure Dojj will verify that too ;)>>> >
-->>> > Chet>>> > www.retro-renault.c­om>>> >
As found in older fords?>>> It is beacuse the servo action is via a pump.>>> On the vaux (bosch) the brakes are sperate from the abs function. Any>>> failure and normal braking occurs.>>>
Older fords, renaults and some pugs i think. Its just your statement >>"there>>is no danger in having the abs not working." can be a little misleading :)­>
Yeah, a colleague had a Pug 405 Mi16 and the Bendix unit failed. He> ended up taking a sharp corner very very fast and was lucky to keep it> on the road.

Heh, when I first read that, it was as though the Bendix failure caused him
to find a sharp twisty corner...

...a mate of mine would say that if the car went around the corner at that
speed he'd not need the brakes anyway! :)­
It was going to cost quite a few hundred even for a recon unit so it> was eventually sold to somebody who needed the engine for a transplant> into a Mini or something..



--
The DervMan
www.dervman.com


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CarGuru > Technology > MOT regs abs warning lights 7 May 2005 20:29:24

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