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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Posted on Jan 02, 2017

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GWM 2.2 Pick up keep on failing 40 amp fuel pump relay


If the fuel pump relay/fuse blows immediately the it shouldn't be too hard to diagnose. I would start by removing the power wire off the fuel pump. (If not sure which is power remove both) replace/reset relay again and see if it blows. If not blown then your pump has gone to earth ( it's bad). If it still blows then the wire between fuse and pump is going to earth. (not so easy to trace).

Mar 01, 2018 | Cars & Trucks

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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.
26322929-c15bjyrfwzlf33vqjpu1ik1c-2-0.jpg

Oct 22, 2016 | 2004 Chrysler PT Cruiser

3 Answers

New fuel pump, ccrm and fuel filter and still blowing 20 amp fuel pump fuse


If the components are all good, then check wiring connectors and wiring circuits, it appears the problem is after the ccrm. wiring from ccrm to fuel pump. For testing you should be able to use jumper wire with inline 20 amp fuse, from voltage to fuel pump connector, to see if it will run w/o blowing the fuse. As you can see from ccrm to inertia switch there are two connectors. From inertia switch to fuel pump, one connector. There are many ways to test. With connectors unplugged, you could use a test lite connected to battery voltage, touch correct wire terminal, if lite comes on, that circuit is going to ground, somewhere.
See that one wire that goes down, wire circuit from ccrm to inertia switch, that wire goes to pcm, I believe it to a monitor circuit, the pcm monitors the voltage on that circuit.
fuel pump mustang-cnoq2pfwcs5zpwrvfs0kgho1-3-0.jpg

Aug 01, 2017 | 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

PCM fuse keeps blowing


It's possible you ran the battery down, trying to start? Have to make sure battery has a full charge and battery connections all good. If battery is down, have to use a charger and get it charged, we can't test anything if battery is down.
I did look at power distribution wiring diagram for your vehicle, I found pcmB fuse--20 amp. Two fuse legs goes to pcm, the other goes to load side of fuel pump relay. If I had to guess, I'd say the fuel pump has a problem. If the wiring before the fuel pump relay or the pcm was the problem, then the fuse would blow as soon as soon as you plug it in. The fuse circuit shows to be hot all the time. Just my opinion. There might be other issues, but, I can't track it from where I am.

Aug 06, 2017 | 2005 GMC Yukon XL

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

1 Answer

My 1997 k1500 5.0 keeps blowing the fuse for the fuel pump,the pump was put in about 6 months . i track a grey wire from the fuel pump RELAY through the back but don't know to what it gose to,i cut the...


that gray wire is the fuel pump power supply . You cut the wire were an positive tested it ??? An what does that mean . you positive tested it ? Wish you people would learn to talk like a mechanic would ! If you cut the wire near the relay an checked with a ohm meter or a test light with B+ volt , of couse it going to show ground ! It's going through the fuel pump windings to ground on the other side . What fuse keeps blowing ?ECM B - 20 amp ? This powers the fuel pump as well . May not even be the fuel pump circuit blowing the fuse . You need to find everything that fuse powers and isolate the different circuits . Videos on youtube showing how to find a short .

Aug 10, 2017 | 1997 Chevrolet K1500

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

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