Battery Discharge
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Freshman User
Joined: Sep 2005
Posts: 38
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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?
Elder User
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 .
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Freshman User
Joined: Sep 2005
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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?
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
# 3 in the dist. box is....
Daytime running lamps(canada only)
Headlamp flash to pass...
Horn...
Daytime running lamps(canada only)
Headlamp flash to pass...
Horn...
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Post Fiend
Joined: Oct 2003
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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.
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.
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