fuse 45 ?
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4wd Low
Joined: Jul 2022
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fuse 45 ?
I have a 2003 V10 excursion that kept dying on idling or backing up .. Engine light on and the dash lights went off. I read here could be coils. changed coils and spark plugs. Engine light off and running good but now dash lights went out while doing a test drive. Scan says fuse 45
Hotshot
Joined: Feb 2015
Posts: 17,559
Likes: 1,081
From: Central Delaware
Welcome to FTE. I'm not sure if you are asking where fuse 45 is, or if there is a question at all. Whatever, we have several sub-forums where you can ask your questions, regarding your specific truck, or even specific issue. Under the "Super Duty/ Heavy Duty" heading, you will find a section dedicated to the Excursion. Under the "Miscellaneous" heading, you will find a section dedicated to the electrical system and wiring. Either of these, or both, may give you the information you seek. Also, don't forget to join your Texas State Chapter. Someone with experience, with your issues, may well be right around the corner.
FTE Community Team
Joined: Jan 2019
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Weird issue! The folks over in the "Excursion - King of SUVs" forum can help you out.
Welcome aboard!
Welcome aboard!
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
There is no such thing as a "Scan says fuse 45".
Unlikely that a relay would cause that issue.
That means someone swapped in a higher value fuse in an attempt to stop the fuse from blowing.
F45 is the fuse that supplies the instrument cluster so, when it blows, the cluster has no power. The actual cause of that blown fuse is almost always due to a damaged wire harness where it exits the shift lever tube. You have to remove the column shrouds to inspect and repair.
Fuse 45 kept blowing out. I think I found the problem, relay 116.
Plus wrong size fuse for 45 had a 20 Amp ,needed 10 Amp.
F45 is the fuse that supplies the instrument cluster so, when it blows, the cluster has no power. The actual cause of that blown fuse is almost always due to a damaged wire harness where it exits the shift lever tube. You have to remove the column shrouds to inspect and repair.
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I love when I go to answer these types of questions but get saved by @projectSHO89 , perfect answer !!! 
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Thread Starter
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4wd Low
Joined: Jul 2022
Posts: 11
Likes: 0
There is no such thing as a "Scan says fuse 45".
Unlikely that a relay would cause that issue.
That means someone swapped in a higher value fuse in an attempt to stop the fuse from blowing.
F45 is the fuse that supplies the instrument cluster so, when it blows, the cluster has no power. The actual cause of that blown fuse is almost always due to a damaged wire harness where it exits the shift lever tube. You have to remove the column shrouds to inspect and repair.
Unlikely that a relay would cause that issue.
That means someone swapped in a higher value fuse in an attempt to stop the fuse from blowing.
F45 is the fuse that supplies the instrument cluster so, when it blows, the cluster has no power. The actual cause of that blown fuse is almost always due to a damaged wire harness where it exits the shift lever tube. You have to remove the column shrouds to inspect and repair.
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willbryantdriver
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Jun 22, 2022 07:03 AM