Question about 2008 Ford F 450 Super Duty

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2008 f 350, 6.4 diesel keeps blowing fuse #74 as soon as you start to crank the engine to start. will not start

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: 1999 Ford F-450 7.3 diesel

It is most likely fuel heater in bottom of filter housing. Unplug it on backside of housing and reinstall good fuse and see if it quits blowing. If so, updated fuel heater availible through Ford.

Posted on Jan 03, 2009

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saailer
  • 1871 Answers

SOURCE: 30 amp fusethat controls the starting blows as

Hello! Go to www.Autozone.com...You will need to register (very safe site)...Sign in...Input your vehicle specifications...Click on vehicle repair guides...Select chassis electrical...then all the way down on the left; click on wiring diagrams... Select figure #12; starting chassis schematics.

If you require any help in troubleshooting I will be more than happy to assist. Just type your request when you rate this solution.

Guru...............saailer

Posted on Dec 13, 2009

texastbone
  • 63 Answers

SOURCE: 1999 f350 diesel engine shut down, turns over but

that fuse powers pcm fuel heater and some other things. when the fuse blows the pcm shuts down. causing it to not run. usually its the heater that is bad. it is located at the back driver side by the fuel pump. you can unplug it and see if it starts. if so you will need to replace the heater

Posted on Jan 06, 2010

  • 1 Answer

SOURCE: ford f350 diesel truck 30 amp fuse keeps blowing.

It is the fuel heater, All you have to do is unplug it.a4c0d50.gif

Posted on Jan 06, 2010

Testimonial: "Thanks for the diagnosis. It's disappointing that our local Ford service will not advise to help get it running, even to make it in for service."

  • 291 Answers

SOURCE: 98 Ford F150 4.2 Liter Engine will not crank keeps

Sounds like there's a grounded wire somewhere between the ignition switch and the solenoid. When you bypass the switch with the screwdriver you don't ground out the line, but with the switch the ground shorts the circuit, blows the fuse, and then won't start the engine.

Posted on Apr 18, 2010

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1 Answer

Fuse s under hood keeps blowing. It is the inj/coil fuse


Try jumping the starter with the key on. If it doesn't blow. Check the start wire for chafing and grounding out. You can pull the starter relay, Try to start it, see if it blows,yes, it is between the fuse panel and fuel pump. no. Put it in and pull the fuel pump relay. Start it. If it blows, then it is some where between the fuse panel and starter. If you have one of those intelligent fuse panels, it could be that also. You can have the codes read for it. But it takes a scanner, not a code reader.

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04 Suzuki Forenza as soon as I plug in the fuse the fuse blows it's the IGN fuse number 2 number ones okay number to keep blowing as soon as i plug in no key In the ignition


that means one of the loads on the fuse is shorted.
what you are missing is a real schmatic of the car.
why not read that first.
then pull all loads on that fuse 1 by 1,
or put them back 1 by 1, (better) to see which load blows that fuse.
no engine stated, there are like 5,... and wiring varies by that.
alldata.com has that, (fast)
or so does suzukipitstop. the real FSM it is.
ive posted both links 100 + times here.
IGN2 shorts. ill look for you. .....

first off , does fuse blow key on only
or only cranking engine??????

that fuse IGN2, runs fuse 5,6,7,8
so pull those and see if the short goes away.
if it blows only cranking the starter, then that is what is shorted,
the starter key line.
if how ever (im reading the real schmatic) the fuse blows only keyon.
then its is 5,6,7,8 is shorted. loads to one of those 4.
so pull them.
F5- not used
F6- a/c , defrog, pwer windows, headlights and DRL
F7- blower and A/C
F8- mirror.

once we know the Fx that blows above.
we then can start removing those loads.
that is how shorts are found , (unless you have the schematic like I have and the amp clamp meter, so i can see what load is shorted
the easy way ,there is no other way ,but to pull loads on the Failing branch.)

end sorts 101.

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cor thats a new tranny ,too new for me i think ? now this fuse? whats is listed as doing ? no doubt you want this for work monday so i would suggest you chug it around to your local ford truck centre and iam sure they will have seen this fault before and know exactly what to fix ?

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As soon as I turn the key the engine will crank but, won't start. I check the fuse box and EFI fuse is blow off.


that would be for the fuel , with it blown it will not get fuel so it will crank and crank until the battery is drained, replace fuse. Tim

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I would start at the starter, it could have a short but it's only apparent when the engine gets it hot. you can try to pull the fuses to other things and see if the problems stop. this will at least give you an idea of where to look. also check fusible links and look for wire corrossion

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98 Ford F150 4.2 Liter Engine will not crank keeps blowing fuse #21 (15amp) as soon as I turn the ignition key. Was running fine just stopped to gas up and it wouldn't crank. Jumped the posts on the...


Sounds like there's a grounded wire somewhere between the ignition switch and the solenoid. When you bypass the switch with the screwdriver you don't ground out the line, but with the switch the ground shorts the circuit, blows the fuse, and then won't start the engine.

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Fuse blows when trying to start engine then engine will not crank until fuse is changed then the same happens again. Escort 1.8 diesel van


There is a short circuit among the starter wire,you need to check it or do change the starter motor wire.

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Ford f350 diesel truck 30 amp fuse keeps blowing.


It is the fuel heater, All you have to do is unplug it.a4c0d50.gif

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Engine cut off and cant start


If the fuse blew at once, then you have an electrical short. Try disconnecting power lead to start, cover with insulating tape/electrical tape, put new fuse in place, and attempt to "start". if fuse does not blow then the starter motor has an internal fault, replace starter and enjoy. Keep me posted as you perform these tests.

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