Question about 1993 Nissan Altima

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Electrical current problem with the fuel pump

The problem is that the electrical current is not passing thought the pump and the fuse is in okay conditions, but the pump doesn't work.

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Then you have a ground problem. that is the only thing that will keep current from traveling through the pump is that it is not grounded.

Posted on Sep 27, 2009

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2003 olds alero crank no start, thought it was passlock. by passed this, it almost starts with either. cycle the key and pump works but no pressure after that.


Make sure you're getting power to the fuel pump after start up. GM cars provide power to the electric fuel pump via the starting circuit when cranking and switch to alternator/battery power via the fuse block and 12v relay with ignition on in run position. Check your fuse block (bad fuse; power not getting to part of fuse block) and fuel pump relay. Could also be plugged fuel filter, bad pump or ?. but not likely because you get fuel while cranking. Check for error codes in the engine control computer (GM OBDII) as well but that probably won't show anything. Good luck and good hunting. I had a similar problem with a Chev Astro. Turned out to be power not getting to one bank of the fuse block because of a burned junction terminal buried behind the battery under the hood. Get out the multimeter and start looking for failed electrical components or broken wires.

Jan 21, 2014 | Cars & Trucks

1 Answer

Fuse for fuel pump keeps blowing


Normally fuse blows off if more current passes through it than what it is designed for.

Probably it is worth checking what original fuel pump fuse amps requirements and have the same installed.

Also check the relay if there is a relay set for the fuel pump.

Good luck

Jul 13, 2012 | 1992 Toyota Previa

1 Answer

My 1989 buick park avenue keeps dying. a friend ran a test on it and it said the fuel pump was the problem, but the fuel pump fuse keeps bowing too... Would this be a short somewhere or the fuel pump...


My first thought is that you have wires shorting out somewhere, probably right above the gas tank. Either way, you're going to have to pull the gas tank off to find it. Usually, when a fuel pump dies, it just doesn't work, and won't normally blow a fuse. Pull the tank down, inspect the wiring, and change the fuel pump if the wires check out okay.

Aug 08, 2011 | Buick Park Avenue Cars & Trucks

1 Answer

No current to the fuel pump


CHECK FUEL PUMP FUSE AND RELAY.IF OKAY PROBABLY THE INERTIA SWITCH NEED RESETTING.

Sep 07, 2010 | 1988 Ford F 150

1 Answer

SV10 - V6 - Camry no power is getting to my fuel pump the fuse is ok and fuel pump works i can not find a fuel cut or fuel relay. A postion exists however its not in use. All I did was jack it up rotate...


SWITCHES & RELAYS Switches are used in electrical circuits to control the passage of current. The most common use is to open and close circuits between the battery and the various electric devices in the system. Switches are rated according to the amount of amperage they can handle. If a sufficient amperage rated switch is not used in a circuit, the switch could overload and cause damage. Fig. 1: The underhood fuse and relay panel usually contains fuses, relays, flashers and fusible links tcca6p02.jpg
Some electrical components which require a large amount of current to operate use a special switch called a relay. Since these circuits carry a large amount of current, the thickness of the wire in the circuit is also greater. If this large wire were connected from the load to the control switch, the switch would have to carry the high amperage load and the fairing or dash would be twice as large to accommodate the increased size of the wiring harness. To prevent these problems, a relay is used. Relays are composed of a coil and a set of contacts. When the coil has a current passed though it, a magnetic field is formed and this field causes the contacts to move together, completing the circuit. Most relays are normally open, preventing current from passing through the circuit, but they can take any electrical form depending on the job they are intended to do. Relays can be considered "remote control switches." They allow a smaller current to operate devices that require higher amperages. When a small current operates the coil, a larger current is allowed to pass by the contacts. Some common circuits which may use relays are the horn, headlights, starter, electric fuel pump and other high draw circuits. Fig. 2: Relays are composed of a coil and a switch. These two components are linked together so that when one operates, the other operates at the same time. The large wires in the circuit are connected from the battery to one side of the relay switch (B+) and from the opposite side of the relay switch to the load (component). Smaller wires are connected from the relay coil to the control switch for the circuit and from the opposite side of the relay coil to ground tcca6g02.gif
prev.gif next.gif --- I am not aware of an inertia switch on Toyota vehicles. I don't think it's like a ford. Look for a fusible link, fuse, or relay problem.

Jul 26, 2010 | 1996 Toyota Camry

2 Answers

Trying to locate fuel pump relay for 1991 corvette- coupe


The fuel pump relay in the 1991 corvette is located under the IP on the pass side.
Open pass door, unscrew two screws under the glovebox (you will be upside down in the car), take off the fuse panel, unscrew third screw to plastic plate underneath glovebox, pull away carpet (velcro), pull down plastic plate (watch out for the wiring to the lamp), then under the glovebox you will find a number of fuses and relays if you dive in under there DEEP, prob 4 or 5 in a row, not really sure wich one, but one in the middle is the fuel relay, and they are the same (interchangable).
Take a look at --the12volt.com/relays/relays.asp--
It´s those relays we are talking about.

Jul 08, 2009 | 1991 Chevrolet Corvette

1 Answer

I need a fuse box diagram for a 1992 Ford Ranger. Any idea where I could find one?


owner manual.

here's the big ones for 1994 ranger. all i have
Section 18-01: Wiring and Circuit Protection 1994 All Ranger, Explorer and Aerostar Vehicles Workshop Manual
SPECIFICATIONS Specifications

High Current Fuses And Circuit Breaker — Ranger 2.3L, 3.0L And 4.0L
Circuit Size Location Electric Fuel Pump 20 Amp Fuse Power Distribution Box Headlamp Switch Feed 40 Amp High
Current Fuse Power Distribution Box #36 Circuit Alternator Output #2 15 Amp Fuse Power Distribution Box Fuse Panel 60 Amp High
Current Fuse Power Distribution Box Power Locks 20 Amp High
Current Fuse Power Distribution Box #38 Circuit Alternator Output #1 12 Ga Fusible
Link Integral with 14305 W/A Powertrain Control Module and Power Relay 30 Amp High
Current Fuse Power Distribution Box 4x4 Electric Shift 20 Amp High
Current Fuse Power Distribution Box Ignition Switch Feed 60 Amp High
Current Fuse Power Distribution Box High Beams and High Beam Indicator 22 Amp C.B. Integral with Headlamp Switch Front Wiper and Washer 6 Amp C.B. In Fuse Panel Power Windows 30 Amp C.B. In Fuse Panel Cigarette Lighter, Flash to Pass and Power Lumbar 20 Amp C.B. In Fuse Panel


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May 13, 2009 | 1992 Ford Ranger

2 Answers

Fuel pump or fuel pump relay on 1989 Chevy Suburban 1500 4x4


the relay and fuse are in the power distribution box under the hood. as far a by pass you still can use an aftermarket electric pump ,however the cost will be about the same as re3moving the old pump in the tank if that is the cause in the first place. if all you need is the relay replaced then i'm sure that the pump is still good. if the pump is bad then make sure if you by pass the in tank pump that the new under hood electric pump has enough pressure to give the needed gpm(gallons per minute) required for your system and that if wired into the current fuel circuit that you dissconnect the wire harness to your tank pump

Apr 26, 2009 | 1989 Chevrolet Suburban

1 Answer

1988 ford truck f-150 xlt lariat cant get current to fuel pump


Have you checked the 'inertia switch' which in the event of an accident shuts off the fuel supply to prevent a fire . It's usually located in the cab on pass. side. Some models have one reset button, some 2 which have to be pressed at the same time. If that's not it, here's how the power to the pump SHOULD work, you will have to follow the path to see where it stops. When you turn the key on it turns on the EEC power relay on, this relay then provides power to the PCM (power control module) and the control side of the fuel pump relay. Power for the fuel pump is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse current flows thru the fuel pump relay and inertia switch to the fuel pump. The fuel pump relay is controlled by the PCM. When the ignition switch is turned on the fuel pump will operate, if the switch is NOT turned to start position, the PCM will shut off the fuel pump off after 1 second. This is to avoid flooding the engine when it is not running, just key on. So check out to see if you have a fuse link or a high current fuse and if they are blown.

Apr 14, 2009 | 1998 Ford F150 Regular Cab

1 Answer

Fuel pump


probe elect. circuit of pump must be some damaged wires along the way

Mar 12, 2009 | 1995 Dodge Neon

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