Need Help
Need Help
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
Hello Denver and welcome to FTE! 
If I am not mistaken, the battery light being illuminated indicates a charging problem. This is like the alternator light in older vehicles. It may be starting now but pretty soon it may not. The high idle could be a IAC or TPS problem. Take it and have the alternator checked out. Good luck.
If I am not mistaken, the battery light being illuminated indicates a charging problem. This is like the alternator light in older vehicles. It may be starting now but pretty soon it may not. The high idle could be a IAC or TPS problem. Take it and have the alternator checked out. Good luck.
Posting Guru
Joined: Oct 2005
Posts: 2,209
Likes: 1
From: Louisville, Kentucky
Originally Posted by FordMan03
Just start it and pull the postive off the battery. If it shuts off, this tells you your truck is running off the battery and the alternator is bad.
The battery provides a filtering effect on the electrical system. Removing the battery from the alternator will unload the system and can have very detrimental effects on electronic devices in the truck.
Junior User
Joined: Nov 2006
Posts: 58
Likes: 0
Originally Posted by KingRanchMan02
Not the best advice. The battery provides a filtering effect on the electrical system. Removing the battery from the alternator will unload the system and can have very detrimental effects on electronic devices in the truck.
The battery provides a filtering effect on the electrical system. Removing the battery from the alternator will unload the system and can have very detrimental effects on electronic devices in the truck. 
New User
Joined: Oct 2006
Posts: 24
Likes: 0
Sorry for the bad advice. I guess I'm just old school. Thanks for straightening that out fellas before I caused somebody to damage their truck including me.
Trending Topics
Junior User
Joined: Jan 2007
Posts: 61
Likes: 0
From: Knoxville
Indeed! Modern Alternators monitor battery voltage & need the 12 volt input to operate properly. Any Autozone, Oreily's, Advanced or other chains will test your charging system for free because they hope to sell you the parts to fix it. If your not capable of replacing parts Then chains like PepBoys will do installs & Those like AZ & ADV will normally have a local shop or 2 they recommend.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
