Battery Discharge

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Aug 24, 2007 | 08:52 AM

#16

fuelman

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Joined: Dec 2004

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From: Toulon,Il.

DixieDirt how's it going any luck w/the drain?

Aug 26, 2007 | 03:52 PM

#17

DixieDirt

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Sorry about the delay in info all, but they have me working overtime again and haven't had much time to mess with the old ford. Anyways, I tried to pull fuses to see which one would make the light go out and that really didn't work. On the other hand, I have determined that there is power going through fuse positions, 4,5,8,9,12,13, and 16 in the cab and positions 1,2,3,4,8,9,10,13,15,17,18,19,20 and 21 in the PDB. I don't think all those fuses should have power when the truck is off with the key in my pocket. So where should I do now?

Aug 26, 2007 | 05:49 PM

#18

Mark62

Tuned

Joined: Jul 2007

Posts: 291

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From: Cookeville, TN

There must be a relay that when the Key is on gives everything power.
I would start there. Sorry but I don't know where it is....

Aug 27, 2007 | 01:54 PM

#19

DixieDirt

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Anybody have any more ideas?

Aug 27, 2007 | 02:40 PM

#20

fuelman

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Joined: Dec 2004

Posts: 891

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From: Toulon,Il.

Disconnect all wires on the battery side of the starter relay,then reattach only the wire to the batt.redo drain test.This will test only startlng circuit ,use test light or meter. If you have power replace relay .

Sep 4, 2007 | 10:45 AM

#21

DixieDirt

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Well, it seems that I have found the draw or at least what fuses are allowing the draw. Fuse position 3 (in the power distribution box) will almost stop the test light from glowing and fuse position 13 shuts it off completely. Without fuse 3 removed, the test light glows amost as brite as if it were connected directly to the positive and negitive side of a good 12 volt battery. Now what exactly do the fuses provide protection for?

Sep 4, 2007 | 11:02 AM

#22

fuelman

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Joined: Dec 2004

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From: Toulon,Il.

Look on inside of fuse cover it should give u an idea. Some will have an owners manual or service manual to help w/more details .

Sep 4, 2007 | 11:28 AM

#23

Action4478

Hotshot

Joined: Aug 2006

Posts: 10,764

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# 3 in the dist. box is....

Daytime running lamps(canada only)

Headlamp flash to pass...

Horn...

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Sep 4, 2007 | 12:07 PM

#24

Cuda_jim

Post Fiend

Joined: Oct 2003

Posts: 5,903

Likes: 1

From: MICHIGAN

You can get a copy of your owners manual here:
https://www.fleet.ford.com/maintenan...ls/default.asp

Fuse 13 under the hood says see fuse 5, 9 & 13

5 is backup lamps, trailer battery charging relay, DRL
9 is PCM relay, electronis tran control, IPR, IDM

You need to use an AMP meter because there is always a small draw in the batts. It should be no more the .05 amp.