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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

1997-2003 FAQ Thread

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Old 09-28-2017, 08:49 AM
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Originally Posted by link5631
Most if not all cars have a 100-150amp "mega" fuse that run inline with the alternator. If you jump start a vehicle backward or put a lot of amperage through the charging system, it will blow this fuse instead of destroying the vehicles electrical system... well, in theory, it will. At least thats what i've always been taught, never had to change one to find out.

As to where it is at, start at the alternator and follow it back to the firewall. They're usually screwed into it.
Huh, learn something new every day. Lol
Old 09-28-2017, 05:25 PM
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Originally Posted by jprevat
Huh, learn something new every day. Lol

Found a video showing where it is at.
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Kdubidub559 (06-24-2021)
Old 10-04-2017, 10:08 PM
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Ford deleted the MEGA fuse incorporation many years ago. In fact, 1998 to be exact. Took it out completely. It was a terribly problematic design with the way they worked it in. Nothing dangerous, but caused much havoc. But yea, that was a long time ago. MEGA fuses are used today after market, but much differently and vibration proof.

Last edited by Jbrew; 10-04-2017 at 10:10 PM.
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Old 10-04-2017, 10:29 PM
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Originally Posted by MurrietaCa
I cant find my mega fuse anywhere i have a 03 5.4 Ford F-150 Does anyone have a pic of where i can find it I've looked all over and cant find it. Its making me have more grey hair just thinking about it. Please HELP. Thank you
Yea, you never will lol. Ford uses a a mini fuse (10 I think) inline with the alt harness. Ford tossed the MEGA fuses and opted to split the battery hot right down the middle close as they could to the terminal. They then fused each leg in line and vibration resistant. This is encased in that plastic holder directly in front of the battery between pos and neg posts.
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BillSF9c (02-27-2024)
Old 08-11-2018, 01:03 PM
  #65  
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Originally Posted by 2thousand5.4
It's a huge pain in the ***. It's not gonna come out in one piece. I had to break the mounts of my old ones
The actuators fit in two slots right behind the door latch inside the door. Remove the bolt with the 11mm head that holds the window track, and pull the track out of the way. Take a long heavy screwdriver and pry the actuator towards the outside of the door. It will take some force, but it should slide off the track.
Old 08-24-2018, 09:38 PM
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Originally Posted by jprevat
Yes you can.
Have a question does all the holes line up with the 03 Expedition dash on a 99 F150
Old 08-24-2018, 10:06 PM
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Originally Posted by Larzeff
Have a question does all the holes line up with the 03 Expedition dash on a 99 F150
Might have to be a little more specific. If you mean the main dash then it should.
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Old 08-25-2018, 06:10 AM
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Yes the whole dash. I'm having to fix the a heating problem and figured since the whole dash has to be removed might as well upgrade the interior
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Old 08-25-2018, 08:28 AM
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As far as I know they share the same substructure. You should be fine.
Old 08-25-2018, 08:41 AM
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You know how I would go about rewiring and fixing the gage cluster? This would be my first ever work on something like this and I'm completely over my head with this


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