Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
computer on a 03 f-150
12-17-2018, 08:51 PM
Post: #1
computer on a 03 f-150
I plug my code reader in and nothing happens, I was told it could be a fuse does anyone know where that fuse is ? thanks
Find all posts by this user
Quote this message in a reply
12-17-2018, 10:30 PM (This post was last modified: 12-17-2018 10:32 PM by Rupe.)
Post: #2
RE: computer on a 03 f-150
Can't recall your exact location because Ford seems to move the fuse box every few years. They do use more than a single location so first place to look is under the hood by the master cylinder. There's' typically another inside the vehicle which will be in one of three places. Sometimes it's tucked under the dash above where your left foot would be (against the firewall) and sometimes in the face of the dash by your left knee. (removable panel) The other location would be in the passenger side kick panel. One screw-ball thing I do recall is they tend to share power to the data link plug with the lighter so don't overlook that when checking fuses.

Edited to add: You may want to double check your code reader on another car to make sure that is working.

Let us know how you make out as it may help others reading here.
Find all posts by this user
Quote this message in a reply
12-28-2018, 02:35 PM
Post: #3
RE: computer on a 03 f-150
(12-17-2018 10:30 PM)Rupe Wrote:  Can't recall your exact location because Ford seems to move the fuse box every few years. They do use more than a single location so first place to look is under the hood by the master cylinder. There's' typically another inside the vehicle which will be in one of three places. Sometimes it's tucked under the dash above where your left foot would be (against the firewall) and sometimes in the face of the dash by your left knee. (removable panel) The other location would be in the passenger side kick panel. One screw-ball thing I do recall is they tend to share power to the data link plug with the lighter so don't overlook that when checking fuses.

Edited to add: You may want to double check your code reader on another car to make sure that is working.

Let us know how you make out as it may help others reading here.

haven't found the bad fuse. my code reader does work on other cars.anyone have any other ideas that i might check. thanks
Find all posts by this user
Quote this message in a reply
12-28-2018, 03:00 PM (This post was last modified: 12-28-2018 03:14 PM by Rupe.)
Post: #4
RE: computer on a 03 f-150
Here's some info to figure out if you may have a bum connection to the OBD2 plug.

This page has some easy to use pointers http://pinoutguide.com/CarElectronics/ca...nout.shtml

On the top left (in yellow) is a diagram of the plug showing the numbered pin locations so you can compare with the chart part way down the page. Obviously you need +12 volts and a ground to make the code reader work.

Next question is about this vehicle running or is everything dead?

Something I learned about Fords a few years ago is the fuse box was manufactured like a PC board, meaning it's rather fragile and suffers when aftermarket items are connected. One truck that comes to mind had a plow installed and the installer added those fuse jumpers that allow more fuses to be added in piggyback fashion. After a few years the added lights and plow controls burned board and half of the fuses had no power so the engine wouldn't start. The fix was a $300 fuse block and a half day's labor. (not counting diagnosis)
Find all posts by this user
Quote this message in a reply
12-28-2018, 03:44 PM
Post: #5
RE: computer on a 03 f-150
(12-28-2018 03:00 PM)Rupe Wrote:  Here's some info to figure out if you may have a bum connection to the OBD2 plug.

This page has some easy to use pointers http://pinoutguide.com/CarElectronics/ca...nout.shtml

On the top left (in yellow) is a diagram of the plug showing the numbered pin locations so you can compare with the chart part way down the page. Obviously you need +12 volts and a ground to make the code reader work.

Next question is about this vehicle running or is everything dead?

Something I learned about Fords a few years ago is the fuse box was manufactured like a PC board, meaning it's rather fragile and suffers when aftermarket items are connected. One truck that comes to mind had a plow installed and the installer added those fuse jumpers that allow more fuses to be added in piggyback fashion. After a few years the added lights and plow controls burned board and half of the fuses had no power so the engine wouldn't start. The fix was a $300 fuse block and a half day's labor. (not counting diagnosis)

the truck is running i just pluged my code reader in just to check things out.
Find all posts by this user
Quote this message in a reply
12-28-2018, 08:35 PM
Post: #6
RE: computer on a 03 f-150
Now would be a good time to check out that plug and make sure it works... BEFORE you need to do any diagnosis.
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 1 Guest(s)