Question about 1990 Saab 900 Hatchback

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Engine dies when anti lock light comes on

I have a 1990 saab 900 that when ever the "anti lock' light comes on the engine dies. What is the problem and how can i fix it?

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The ABS light should only come on when there is a problem in the ABS system: a wheel sensor or hydraulic unit problem.

The ABS system shouldn't be interconnected to the engine system so that an ABS fault shuts down the engine. Are you sure as to cause and effect? Could a shorting out of the ignition switch (thereby switching off the engine) be lighting the ABS lamp?

Get a wiring diagram and check for good grounds at the appropriate locations for a 1990 SAAB; also check for possible shorting out of the ignition switch under fault conditions.

The best source of info on this car is the "Bentley Bible" aka the Saab 900 Official Service Manual, costs about $40 from Amazon!

16 valve manual: http://www.amazon.com/Saab-900-Valve-Service-Manual/dp/0837603137

8 valve manual :http://www.amazon.com/Eight-Official-Service-Manual-1981-1988/dp/0837603102

The ABS system is complex, and best worked on by a trained and trusted professional.

Hope this points you in the right direction!

Saabreur

Posted on Aug 09, 2009

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