Ground locations
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Freshman User
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Ground locations
Can anybody tell or describe where ALL the grounds are in the engine compartment? The issue I'm having is a slow drain on the batteries, once a week I will have to put the batteries on the charger because they are to low to start the truck. I'm thinking that the batteries are dying but, before I spend the money on new batteries would like to make sure everything else is good.
Lead Driver
Joined: Feb 2011
Posts: 8,241
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From: L.A. (Lower Alabama)
It's been awhile since I checked mine so I had to look. The driver side battery Neg goes to the top of the frame near the steering box. The passengers side batt Neg goes to the front of the block on the passengers side under a bolt that holds a support bracket for the trans cooling lines. There is also a short ground between that same bolt and the frame on that side.
There is a smaller gauge ground from the back of the block to the firewall but I think it's for electrical "bonding" and isn't supposed to be carrying a big load.
There are other smaller grounds also but if the big ones for the battery connections are good you should have no problems starting and charging.
There was a thread about slow drain on batteries a few weeks ago that had the info about the computer Keep Alive Memory requirements, what fuses to pull etc. Might be a big help to you if you can find it.
There is a smaller gauge ground from the back of the block to the firewall but I think it's for electrical "bonding" and isn't supposed to be carrying a big load.
There are other smaller grounds also but if the big ones for the battery connections are good you should have no problems starting and charging.
There was a thread about slow drain on batteries a few weeks ago that had the info about the computer Keep Alive Memory requirements, what fuses to pull etc. Might be a big help to you if you can find it.
Cargo Master
Joined: Mar 2007
Posts: 3,103
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From: AB/BC
The passengers underside of the block has the main ground,the ficm has a ground on the last stud on the valve cover and the back of the passenger head had another.There may be other ones that I don't know of.
Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
Can anybody tell or describe where ALL the grounds are in the engine compartment? The issue I'm having is a slow drain on the batteries, once a week I will have to put the batteries on the charger because they are to low to start the truck. I'm thinking that the batteries are dying but, before I spend the money on new batteries would like to make sure everything else is good.
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Actually pretty sure I do have a battery going bad, but just wanting to make sure everything else was fine. I know a bad ground won't drain a battery, but it also won't allow it to charge properly and can destroy the battery that way. Just trying to make sure that the grounds aren't the issue, because the batteries aren't more than a couple years old( not that I replaced what the build sticker says on the batteries.
Fleet Owner
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Had the alternator load tested a couple of days ago and it tested fine 14.6v at idle and 13.9v under load, and the diode was good.
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Lead Driver
Joined: Feb 2011
Posts: 8,241
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From: L.A. (Lower Alabama)
This can be a PITA problem. This thread has some good info that might help:
https://www.ford-trucks.com/forums/1...ery-drain.html
Good luck!
https://www.ford-trucks.com/forums/1...ery-drain.html
Good luck!
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