blowing fuse
blowing fuse
Senior User
Joined: Oct 2007
Posts: 130
Likes: 0
From: Alabama Gulf Coast
The alternator will not blow individual fuses. You need to look in your owners manual and find out what system that fuse is for and give us more info. Then we can start the task of trouble shooting the system with you.
Elder User
Joined: Jul 2009
Posts: 919
Likes: 0
From: Smiths Grove, KY
jb1965, welcome to FTE.
There are primarily three reasons why a fuse will open: overload, short circuit, and inrush current too high for fuse type.
You can evaluate the overload scenario by listing the current draw of everything on the circuit and making sure that it doesn't exceed the fuse rating.
You can use a multi-meter to determine if there is a short in the circuit. If it is intermittent then it can be a bear to track down the location.
The high inrush current scenario is a little tricky in that you have to make sure that the fuse type properly matches the starting current requirements for the devices on the circuit. For example a solenoid is a higher inrush device than a LED and therefore will require a different fuse type to carry the inrush current. Fuses are generally broken down in classes such as fast acting, slow blow, etc.
There are primarily three reasons why a fuse will open: overload, short circuit, and inrush current too high for fuse type.
You can evaluate the overload scenario by listing the current draw of everything on the circuit and making sure that it doesn't exceed the fuse rating.
You can use a multi-meter to determine if there is a short in the circuit. If it is intermittent then it can be a bear to track down the location.
The high inrush current scenario is a little tricky in that you have to make sure that the fuse type properly matches the starting current requirements for the devices on the circuit. For example a solenoid is a higher inrush device than a LED and therefore will require a different fuse type to carry the inrush current. Fuses are generally broken down in classes such as fast acting, slow blow, etc.
Cargo Master
Joined: Jan 2008
Posts: 2,566
Likes: 18
From: The Great White North!
Check out this post and then check the wires under the steering column cover. (post # 31) They are known to short out and give all sorts of electrical problems. If that looks good, I would check the windshield for possible leaks on drivers side. That causes water into the fuse box area, that causes all sorts of bad stuff.
https://www.ford-trucks.com/forums/7...uestion-3.html
Welcome to FTE!
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FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Start with the basics. What fuse is blowing and what does that fuse power? This is important information to know, since you would not suspect the turn signals or turn signal wiring wiring if you keep blowing the horn fuse.
It could be a short to ground somewhere in the wiring harness of the items you listed or it could be a bad component (like the radio) drawing too much current. If you are not comfortable with tracing out automotive wiring (it can be very complicated) then take your truck to an automotive electrical shop for repair.
It could be a short to ground somewhere in the wiring harness of the items you listed or it could be a bad component (like the radio) drawing too much current. If you are not comfortable with tracing out automotive wiring (it can be very complicated) then take your truck to an automotive electrical shop for repair.
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