Question about 1996 Saab 900

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I do not get power to my fuel pump. the fuse is good but where the fuse goes I do not have power. What could be the problem

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Check the fuel line safety cut off switch - usualy a red coloured button under the dashboard on the passanger side - check the user manual if you cant find it - when you do then just push it in to reset it.

Posted on Mar 18, 2011

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Check the crankshaft position sensor, which is on the block behind the exhaust manifold toward the transmission. If this sensor is faulty the ECU does not detect a pulse indicating the crankshaft is rotating, so will not activate the fuel pump. It is a safety feature in event of a crash, so fuel will stop at the pump if the engine stops due to front impact/ crash. If the car starts OK cold , but cuts out when hot, or will not start after running when hot, the crank position sensor will likely be the culprit. No pulse from CPS, no fuel pump. Easy.

Posted on Apr 27, 2014

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1 Answer

No Power to Fuel Pump


Tiffany - -I don't know when you first posted this question, but I am seeing it for the first time at 3:30pm on Wednesday.
The people who answer questions on this website are volunteers, nobody gets paid.
If you would like for me to research the wiring for the pump let me know.

Aug 21, 2012 | Cars & Trucks

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No power on fuel pump in buick century 93, i changed the relay & fuse is ok, that always happen after the car became hot ,next day it wont start


If the fuse and relay is good, and there is power AT the pump, then the pump is bad. Fuel pump power goes through the oil pressure switch but only after engine is running. So there should be power to the pump for approx 2 seconds when you turn key on. There is a RED wire (prime, it will be a single wire poking out near relay) at the fuel pump relay, if you put 12V on that wire the pump should run, IF the wires and pump is good. The GRAY wire powers the pump.

Aug 04, 2011 | 1993 Buick Century

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Starter motor went out on 92 5.0 ho replaced it and new battery, now fuel pump does not work I get a 542 code checked fuel pump relay and inertia switch both good fuse good


  • Code 542 indicates one of the following conditions:

Engine Starts:

· Fuel Pump secondary circuit shorted to power

· Fuel pump relay contacts always closed

· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit

· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power

· faulty ECU

Engine Does Not Start:

· Open inertia switch or inertia switch circuit

· Open in or between ECU and fuel pump (This includes open in fuel pump brushes/windings)

· faulty ground connection at fuel pump

The easiest way to check this circuit is to go to the fuel pump relay. If the relay clicks when the key is turned to the "RUN" position, then the inertia switch circuit is ok.

The Pink/Black wire starts from the fuel pump relay and goes two directions. One side goes back to the fuel pump. The other side is the fuel pump monitor circuit and goes to pin #8 at the ECU. This wire should only be hot for a second or two when the ignition is turned to the RUN position.

The fuel pump relay receives power on the Black/yellow wire. It comes from a fusible link at the power distribution center. This wire should be hot at all times.

If all the above is working as designed, them you probably have a bad fuel pump.

Feb 13, 2011 | 1992 Ford Thunderbird

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Fuel pump is not getting power, already tried switching the two relays by the passenger foot, fuse was good, fuel pump is new and runs when connected directly to battery, but when pump is installed no...


CHECK THE PCM IGNITION FUSE.A BAD OIL PRESSURE SWITCH WILL CAUSE NO START CONDITIONS.TAKE A OHM METER CHECK FUEL PUMP WIRES TO SEE IF ANY IS OPEN OR SHORT.

Mar 28, 2010 | 1999 Saturn SL

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88 thunderbird turbo coupe fuel pump


have you checked all fuses under the hood? have you checked the fuel pump relay? you may be able to swap the fuel pump relay with amother relay in the fuse box.are you getting power into and out of the reset switch? from there it goes to the fuel pump. if power is getting to the fuel pump and it has a good ground, the the pump is bad.

Sep 27, 2009 | 1988 Ford Thunderbird

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You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.

May 11, 2009 | 2000 Buick Regal

1 Answer

2000 S10 4.3L Fuel pump stopped working out of the blue. We Put a new Fuel Pump in, new harnes to fuel pump, new fuel filter, new relay, new fuses in IGN C and ECM B fuses. Still the pump will not turn on....


At the fuel pump relay you should have 1 full time hot wire. 1 hot wire when you turn on the switch. 1 ground, and the other wire goes to the pump. Test the ground to be sure it is good. If so then jump a hot to the one that goes to the pump and see if it runs.If it does then you have a bad relay or ECM. You can swap the relay with another of the same # from tour fuse box to test it.There is also a ground on top of the frame near the filler neck, check it too. Good Luck

May 06, 2009 | 2000 Chevrolet S-10

1 Answer

Cranks but no start


There is no fuel reset button on this van.

To test the circuit before removing the tank, you will need a voltmeter or cheap test light. Disconnect the connector at the fuel tank. On the harness side, locate the gray wire (fuel pump wire). Connect the test light to a good ground. Have a helper crank the engine over. While engine is cranking, the gray wire should have power. If it does, and the pump is not turning on, then the pump must be bad and need replacing. If there is no power on the gray wire with engine cranking, the circuit is the problem, not the pump. Go back and find the fuel pump fuse in the junction block (the fuse relay block where the fuel pump relay is). Check the fuse, also check if there is power going to the fuse. This fuse should be hot at all times. The circuit goes from battery to pump fuse to fuel pump relay to gas tank and the fuel pump.

Aug 02, 2017 | 1995 Chevrolet Astro

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