Question about 1996 Saab 900

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When I try to start my 96 Saab 900 se I can tell that the fuel pump is not working. When I check the fuse with a 12volt meter There is no power on either side of the fuse. however, when I use a jumper wire and supply power to fuse and turn the key on I can hear the fuel pump working. Could this be a problem with the factory anti-theft alarm cutting off power to the fuel pump? How do I fix?

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Yes, it sounds like anti theft. Have you tried one of your other keys? They are coded to the the car and the ECU recognizes whether you are using a correctly coded key. If you just had the key cut, it is suspect. Start there.

Posted on Feb 28, 2009

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To test the relay, remove it and jumper between sockets 30 and 87b (middle and bottom); if the pump runs, the pump is OK and the relay suspect. If the pump doesn't run, then a circuit is suspect, eg power from relay to pump, or power from battery to relay, or a ground connection. To check these you'll need a wiring diagram - get 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
get the appropriate manual for your car and enjoy the Saab!


Most likely it's the relay.


Possible other causes are:
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broken wire connection to pump - check continuity between fuse 30 and pump connection;

dead pump - you could provide power to the pump to check if it runs;

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If you don't check all the fuses realted to the pump.

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