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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Help blown ignition fuse

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Old Sep 4, 2009 | 03:10 PM
  #1  
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Help blown ignition fuse

I need help,
In the last month I have blown my ignition fuse in my 08 F-350
cc long bed diesel. As I turn the ignition on to start the truck, the
dash lights go dead and the truck is dead. The ignition fuse is blown.
The first time I replaced the fuse and was on my way.
Today same thing turned the key to on, boom blown fuse. replaced it
and it blew again. then I put in a second fuse and it was fine.
Any input would be good.
Thanks Jay.
 
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Old Sep 4, 2009 | 03:41 PM
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You should be under the bumper to bumper warranty, let the dealer figure it out.
 
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Old Sep 4, 2009 | 04:08 PM
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Originally Posted by 69cj
You should be under the bumper to bumper warranty, let the dealer figure it out.

I agree, but the problem I want to avoid is, I have an alarm
installed and I don't want to hear "well it's the alarm"
 
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Old Sep 4, 2009 | 05:48 PM
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can you elimate the alarm out of the circuit and then see if you still have the issue?
 
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Old Sep 4, 2009 | 06:14 PM
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Originally Posted by senix
can you elimate the alarm out of the circuit and then see if you still have the issue?
Yes, however I will have to pay the install shop to remove the alarm,
and wait about a month, that is about how long between fuse blows
it seems to take. On one hand it's a good idea, on the other it's costly.
I was hopeing that maybe someone else may have had this problem. if not
I will have no choice but to have the alarm removed.
 
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Old Sep 4, 2009 | 06:19 PM
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put a bigger fuse in it. then see where the smoke comes from. thats the problem! lol
 
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Old Sep 4, 2009 | 06:49 PM
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Originally Posted by mountaineer27
put a bigger fuse in it. then see where the smoke comes from. thats the problem! lol
I did!! it had a 20amp, all I had was a 25amp.
Maybe a paperclip?
 
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Old Sep 4, 2009 | 06:53 PM
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i ment that as a joke. smoke = fire fire =no more truck
 
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Old Sep 4, 2009 | 07:06 PM
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Originally Posted by mountaineer27
i ment that as a joke. smoke = fire fire =no more truck
I know, I'm a mechanic
I was joke"n.
 
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Old Sep 4, 2009 | 09:41 PM
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Originally Posted by the85gti
I need help,
In the last month I have blown my ignition fuse in my 08 F-350
cc long bed diesel. As I turn the ignition on to start the truck, the
dash lights go dead and the truck is dead. The ignition fuse is blown.
The first time I replaced the fuse and was on my way.
Today same thing turned the key to on, boom blown fuse. replaced it
and it blew again. then I put in a second fuse and it was fine.
Any input would be good.
Thanks Jay.
Jay, It would be helpful to know which fuse panel and what fuse number you are talking about to help narrow this down.
 
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Old Sep 4, 2009 | 10:20 PM
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Originally Posted by Ford_Doctor
Jay, It would be helpful to know which fuse panel and what fuse number you are talking about to help narrow this down.
Sorry,
it's the fuse box on the pass foot well,
and fuse #27
 
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Old Sep 5, 2009 | 06:38 AM
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I have a habit of turning everything off before I shut down my truck. A/C, radio, lights, just everything. Maybe you could try it for a while. I don't know if it makes any difference or not but when you start up you won't have any draw from that stuff.
 
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Old Sep 5, 2009 | 07:54 AM
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I would put an amp meter in series with the battery cable and check the current draw when the ig switch is moved to the pre crank position. I suspect a glow plug problem.
 
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Old Sep 5, 2009 | 10:04 AM
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You shouldn't have to uninstall the alarm to determine if it's the problem. Just find where they tied it to power and remove the fuse it's on (if it's not needed for anything important) or disconnect the power wire. Most alarms will also have their own in-line fuses that you can pull as well to take it out of the circuit. If it's determined to be the problem then take it back to the install place and let them fix it. If it's not the problem then take it to the dealer and show them that the problem persists even with the power to the alarm shut off. It should be covered under warranty.
 
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Old Sep 5, 2009 | 10:56 AM
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Originally Posted by Brandon D
You shouldn't have to uninstall the alarm to determine if it's the problem. Just find where they tied it to power and remove the fuse it's on (if it's not needed for anything important) or disconnect the power wire. Most alarms will also have their own in-line fuses that you can pull as well to take it out of the circuit. If it's determined to be the problem then take it back to the install place and let them fix it. If it's not the problem then take it to the dealer and show them that the problem persists even with the power to the alarm shut off. It should be covered under warranty.
Done deal, I will do that today. Thank you.
 
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