Question about 2000 Ford Focus

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Recently starting cutting out & blowing fuel pump fuse. Had pump wiring etc checked & relay changed, worked for 10days then broke down again. Becoming a pain in the backside!

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  • Ford Master
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If the fuel pump was not changed,it is most likely the problem

Posted on Apr 23, 2010

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2004 pt cruiser keeps blowing fuel pump fuse,replaced fuel pump, no change.runs rough at idle and stalls,blows fp fuse,also replaced ign.coil,plug wires and plugs also changed relays


There are two fuses for the fuel pump relay. One fuse is load side of relay, that fuse also sends voltage to load side of asd relay, the asd relay sends voltage to several systems, two of which are the fuel injectors and ignition coil. I'm not telling you to replace, anything, but, you need to do some testing.
The other fuse goes to control side of relay, smaller amp fuse. I don't know the amp rating of the fuse that keeps blowing.
See that fuse, it supplies voltage to load side of fuel pump relay and also to asd relay.
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Oct 22, 2016 | 2004 Chrysler PT Cruiser

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Buick Le Sabre No Start?


I have recently worked on a 1995 Buick Le Sabre that wouldn't start. First checked the fuel pump fuse and relay, they were both good. Then proceeded to change the faulty fuel pump. Proceeded to crank the car up and NO START....
Ended up finding that these buicks have problems with there wiring. So i found the power and ground wire to the fuel pump. Grounded it to the frame, and ran a hot wire up to the dash to a on/off switch that i then ran through the firewall and into a 20 amp fuse link. From there to a power source. Now to start the car, you have to turn the fuel pump on and off when you shut the car off.
But that beats chasing the entire wiring harness down to find a mysterious short.

on Jul 14, 2010 | Buick LeSabre Cars & Trucks

1 Answer

1999 ranger wont start


If that was my vehicle I would not have changed one part

I would have gotten out my wiring diagrams & walked thru a
logical sequence of testing what I had & didn't have, as far
as crank sensor output,fuel pressure,injector pulse,etc

Seeing a how pcm's seldom fail ,your just throwing parts at it
& not testing a thing

You need the wiring diagrams to see & learn how the various
systems work

You can actually trigger injectors,coils,relays,etc if you can
use diagrams, test light,meter & jumper wires properly,otherwise
you need professional help

Jan 08, 2013 | 1999 Ford Ranger SuperCab

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

Turning the ignition to on I can hear the fuel pump relay clicking & most of the time the pump itself.But once in awhile & its happening more & more the relay clicks but no sound from the...


Hello i would consider changing your relay for the fuel pump from experience Ford relays are frisky i own two Ford products i know ounce the relay starts to stick and flicker your going to short the pump usually when i change a fuel pump on a Ford i always a rule change the relay as well due to past experience costumer comes back within a week fuel pump again change the relay with the pump never see them again.So i recommend you change both save your self the grief and you will need to drop the tank down to properly gain access to the wire harness for the fuel pump.

Jan 31, 2011 | 1997 Ford Windstar

2 Answers

1991 chevy cavalier- stopped running going down road. Replaced fuel pump and fuel pump relay-ran for two weeks and the when making a stop,cut off again and won't start and is blowing the fuel pump fuse...


Sounds like a short between the fuse panel and the fuel pump relay. This can be from the fuel pump relay itself through an exposed bit of wire, or even a defective relay which seems to happen more than most times. Check the wiring to the relay and wrap or tape anything where bare wire may be exposed. Disconnect relay and try a new fuse. IF the fuse doesn't blow, then the problem source is the relay itself that is defective.

Hope this helps!
Chip

May 31, 2010 | 1991 Chevrolet Cavalier

2 Answers

Truck cut off, there was no gas going to carburator.


a shorted relay can cause this also a wire rubbed through from when fuel pump was installed. check for cracked wire insulation.

Jun 29, 2009 | 1988 Chevrolet S-10

3 Answers

1999 Hyundai elantra died while driving found ecu fuse blown replaced lasted half a mile and blew again


Check your o2 sensor harness. The harness if not properly secured will rub on the axle to a point where it rubs through the insulation of the wire & shorts on the axle causing the ECU fuse (20A) to blow. Repair the harness & replace the fuse & bada bing! You should be in business! Hope that works. IF NOT follow this K.I.S.S.

Keep It Super Simple! It never fails!

Jun 04, 2009 | Hyundai Motor 1999 Elantra

2 Answers

I cannot get power to the fuel pump/fuel level sending unit


Do you have a check engine lamp on when you turn the key on with the engine off? If not then you most likely have blown the ecm-b 20 amp fuse in the underhood fuse panel when you cut the wires together at the same time to modify the pigtail connector to the new design

Apr 11, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Blowing ECM-B fuses


The first thing you should do is to locate the oil pressure switch/sending unit.


This switch serves two functions.

1) provide oil pressure reading

2) disable the fuel pump relay in event of oil pressure loss.

===

When this switch is failing to provide the correct pressure to the ECU. The wiring harness can overheat and eventually create a short.

ECM B blow is because the harness is grounding/shorting.

===

DO NOT drive the truck until you change the oil pressure switch.

After you change the switch,you should spend sometime to inspect the wiring between the fuel pump relay,ECU and fuel pump.


Please post up day on the comment window/page.

I will follow up on it later.


Good luck.

Aug 24, 2008 | 2000 GMC Savana

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