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CTFordTech
CTFordTech, Ford Technician
Category: Ford
Satisfied Customers: 4970
Experience:  Ford Master School Certified, Kia Elite School Certified, ASE Certified, A/C 609 Certified
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1997 Ford F-150: V6..wheel drive..no head lights no radio no turn sig

Customer Question

Hi I have a 1997 Ford F-150 V6 4.2 litterXXXXXI was driving and all the power went out and nothing would work no head lights no radio no turn sig. but the truck was still running I thought a fuse blew so I pulled over to check it out I turned the truck off checked all the fuses they where all good I tryed to start the truck back up and it would not start but if I jump the truck it will start and drive but has no power I checked all fuse they are good I checked the alternator it is good if I take the battery out and charge it all the way up the ruck will start and everything will work but the battery keeps going dead what is causing this
Submitted: 5 years ago.
Category: Ford
Expert:  CTFordTech replied 5 years ago.

HelloCustomerand Thank you for choosing Just Answer.

 

Sounds like you have a current draw on the battery. Something in the vehicle is needing too much power and is causing the battery to die. Draws unfortunatlly are the hardest to find problems in any type of vehicle. A volt meter will need to be hooked up in amp mode to the batttery in a way that it can test for a draw. After the meter is hooked up every fuse, one by one will need to be removed from the fuse box's to determine what is causing the draw. This is a very technical diagnosis and requires a fair amount of skill to do so. If you think you can do this and would like further information on how to do so, Please let me know.

Customer: replied 5 years ago.
Hello I thought it was something taking to much power to but even if I turn everything off in the truck and use just the heat it drans the battery in less then 10 mins
Expert:  CTFordTech replied 5 years ago.
Yes a major draw is to blame. And pretty much anything electrical can cause the battery to drain that fast such as the radio. It is amazing sometimes how something can kill a battery that quick. Like I said, A meter and pulling of the fuses is what is going to pinpoint the draw for you.
Customer: replied 5 years ago.
Oh ok can you please explane to me step by step how I need to do this what I need to look for or listen for and what tools I need to do it thanks
Expert:  CTFordTech replied 5 years ago.

You will need a volt meter that has an amp setting. The black lead from the meter needs to be in the ground port or common port on the meter. The red lead needs to be in the amps port on the meter. The meter will need to be set at 10 amp max with the dial. Remove the positive battery cable and take on lead an secure it to the battery post and take the other and secure it to the battery cable. The meter will work as part of the battery and evrything electrnic will stil work in the vehicle. After you have everything hooked up, Wait a few mins for the computers to go to sleep. Then start by removing the fuses one by one. If nothing changes on the meter for your reading, You knwo thats not the draw. If when you pull the fuse and the number drops, Then you have found your draw. You will have to do this for all fuse boxes in the vehicle. Make sure not to open any doors, or turn the key on at anytime as this will screw your readings. You may have to put the window down before you start so you can crawl inside to gain acess to those fuses. It can get quite confusing for the average person.

 

Here is a generic picture of a meter and what you need to do with the leads.

 

graphic

 

 

Customer: replied 5 years ago.
sorry i did not get back right away but that was not the problem with my truck it was a wire that go's from the alternator that came lose but thanks for trying
Expert:  CTFordTech replied 5 years ago.
Your welcome

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CTFordTech
CTFordTech
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