ABS WARNING LIGHT

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Quanger
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Sat Aug 09, 2008 9:20 pm

Car failed MOT for warning light/operation defective on a 1991 325i
How do you rectify this fault?

Thanks for any replies

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march109
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Sat Aug 09, 2008 9:22 pm

325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
e30325itourer
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Sat Aug 09, 2008 9:23 pm

in what way defective?staying on all the time or not coming on with ignition?
THE ULTIMATE DRIVING MACHINE
march109
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Sat Aug 09, 2008 9:24 pm

Read the link for common problems and work arounds.
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
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Quanger
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Sat Aug 09, 2008 10:00 pm

Not coming on with ignition.
march109
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Sat Aug 09, 2008 10:05 pm

Someone has disconnected it then or the bulb has blown as per article,

The article also in a roundabout way tells you how to get round it too. I know I wrote the article.
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
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Quanger
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Sat Aug 09, 2008 10:41 pm

Last edited by Quanger on Sat Aug 09, 2008 10:45 pm, edited 1 time in total.
march109
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Sat Aug 09, 2008 10:44 pm

Quanger wrote:Took the cover off the pump is my relays missing??? :?

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Last edited by march109 on Sat Aug 09, 2008 10:45 pm, edited 2 times in total.
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
Jon_Bmw
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Sat Aug 09, 2008 10:44 pm

Usually signs of previous owners bodges. Sounds like he had a wheel sensor fault, which made the abs come on intermitantly and can seriously reduce braking force :eek: He then removed the relay to disengage it and took the abs light out of the dash to 'cover' his tracks.

Thats my guess anyway. Would you like to know the bodge to get it through the MOT as its possibly a sader issue than just replacing a wheel sensor. :cry:
march109
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Sat Aug 09, 2008 10:46 pm

Couldn't tell your pictures don't work for me, but some basic info would help!

Age of car please?
Any relays at all under the cover on the pump?

So far there is nothing here which isn't covered in the article link I posted.
Last edited by march109 on Sat Aug 09, 2008 10:52 pm, edited 1 time in total.
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
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Quanger
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Sat Aug 09, 2008 10:50 pm

Jon_Bmw wrote:Usually signs of previous owners bodges. Sounds like he had a wheel sensor fault, which made the abs come on intermitantly and can seriously reduce braking force :eek: He then removed the relay to disengage it and took the abs light out of the dash to 'cover' his tracks.

Thats my guess anyway. Would you like to know the bodge to get it through the MOT as its possibly a sader issue than just replacing a wheel sensor. :cry:

Yes please
march109
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Sat Aug 09, 2008 10:53 pm

Quanger wrote:
Jon_Bmw wrote:Usually signs of previous owners bodges. Sounds like he had a wheel sensor fault, which made the abs come on intermitantly and can seriously reduce braking force :eek: He then removed the relay to disengage it and took the abs light out of the dash to 'cover' his tracks.

Thats my guess anyway. Would you like to know the bodge to get it through the MOT as its possibly a sader issue than just replacing a wheel sensor. :cry:

Yes please
AGAIN its in the article!

Wire the abs bulb to the battery bulb it will behave just as expected (but not actually mean anything!)
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
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Brianmoooore
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Sat Aug 09, 2008 10:55 pm

Would be a better idea to get some relays and a bulb, plug them in, and see what happens.
The original reason for failure will be flagged up for the tester to see when the car is submitted for a retest, so the usual bodge may not be successful.
Jon_Bmw
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Sat Aug 09, 2008 10:56 pm

Quanger wrote:
Jon_Bmw wrote:Usually signs of previous owners bodges. Sounds like he had a wheel sensor fault, which made the abs come on intermitantly and can seriously reduce braking force :eek: He then removed the relay to disengage it and took the abs light out of the dash to 'cover' his tracks.

Thats my guess anyway. Would you like to know the bodge to get it through the MOT as its possibly a sader issue than just replacing a wheel sensor. :cry:

Yes please
And this is why cars fall apart! :D Not that I would ever condone such a thing... :P

As march said, you can do it to the oil pressure one if you'd prefer.
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Quanger
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Sat Aug 09, 2008 11:01 pm

is the pic working now, are my relays missing?

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march109
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Sat Aug 09, 2008 11:03 pm

yes, also looks to be the later system.

Plug the relays in and watch the light come on instantly and never go out again.
325i Tech 1 Touring, breaking.

2.5 high comp. M20, 3.64 LSD, Fully undersealed, Spax springs & Bilstein shocks, s/s exhaust, Alpina rep wheels and more.
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Quanger
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Sat Aug 09, 2008 11:06 pm

ok thanks guys. think i know what to do now. :)
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