[cinemarr]

My anti lock brakes light won't go off. Does this mean there is something wrong with the ABS or is it electrical?

 

[john-w]

You need to read the fault codes off the ECU.

 

[cinemarr]

padon my stupidity having only owned my saab for 6 months or so but what is the ECU?

 

[john-w]

It's the unit that controlls the ABS can normally be found under the rear seat. Try & get a Bentley repair manual, as this will be a great help with many issues with your car.

 

[john-w]

Found this info here.... http://www.thesaabsite.com/900old/900&79to94faqs.htmHelp with fault codes.

 

[cinemarr]

I have got a Bentley repair manual and thanks for your advice.

 

[ejenner]

I don't think it is as easy to get the fault code from a 1990 car? because they used a different system for this year. The system was changed in 1991 and the diagnostic port was added to the connector under the rear seat. The connector is only 2-pin's and you follow the instructions to retrieve the fault code. Use a paper-clip or similar to jump the connector - this will allow you to read the fault code from a series of flashes of the ABS warning lamp. If you can't find the full instructions just let me know and I will post them.

 

[Matthew]

Most ABS faults are electrical. First thing I'd do is clean up all the ABS electrical connectors with switch cleaner and a brush. Simple things first!

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