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f250 dead short

Old 08-11-2018, 05:04 AM
  #21  
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Yuck

While you are checking the the stud on the driver's side fender, also check the fuse box and the control module behind the fuse box for signs of water damage or corrosion. A known issue, and personally experienced, is a water leak somewhere in the windshield. Water runs down the driver's side pillar and drips behind the fuse box and causes all kind of random electrical problems - "Christine-like" problems.

I had a neighbor who did windshield replacement, so I approached him to pull the windshield to reseal it. He basically refused because he stated whenever he does this for someone, he finds most of the windshield frame rusted and then can't get a good seal. He recommended to take it to the body shop to get the windshield replaced, so they can fix the rust issues in the frame before putting in the windshield.

A potential quick tell-tale if you have the problem is if you can hear relays clicking with the engine off key in run position. Also on engine shut down, you could hear a short concert of clicking relays. However both these situations occur randomly. If anything body electrical happens randomly - horn honks, radio or blower comes on with key in off/out of vehicle position, windshield wipers swipes....etc., consider yourself lucky because now you know what the issue is.

Until the issue is solved, it is best to disconnect the battery negative when leaving the vehicle for any period.

I was lucky, I guess. My truck announced this problem to me at 3am when it decided to sound the horns - one long blast - until I ran outside and pulled the negative cable. Of course, at the time, I just knew the issue had to be the horn switch, so of course I pulled the steering wheel, air bag, etc, and inspected and replaced...yada, yada. Then the truck tried to tell me again a few days later by continuing to run the blower motor after I turned the truck off and took the keys out.
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Old 08-11-2018, 05:52 AM
  #22  
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I had the experiences of a mouse chewing the insulation off a wire and simple friction wearing the insulation off a wire to a car door. In both cases, the wire shorted to the chassis and the battery would go dead if the vehicle sat for a couple days. You may be dealing with a problem like this.
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Old 08-13-2018, 05:02 AM
  #23  
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Well...

After a full week of sitting in the driveway while on vaca.....

she started right up! so.... i dunno. maybe one of the weird intermittent things above.

Going to leave the Merc in the garage for a while and drive this daily until something happens. Son needs to move a couch to his new apt this week and I have several loads of trash at one of my properties I need to dump anyway. Jet ski is repaired so I want to drag that back down the river house too.


Thanks for the suggestions! Def going to check for water in the fuse panel or relays and listen for some clicking....
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Old 08-13-2018, 06:07 AM
  #24  
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GEM module perhaps?
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Old 08-14-2018, 06:59 AM
  #25  
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You should look into a solar charger. I got one from Battery Tender and it works great.
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Old 08-14-2018, 10:39 AM
  #26  
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solar battery tender is good idea for when i park it this week.


I have been commuting with it, cleaning out an old storage unit----> dump runs and tomo helping son move a couch. Have to run Jetski down
and then it will sit for months.

so far everyday it starts first touch of key like it has for 20 years. When i had whatever this mystery is... it died after a couple hours even with brand new batteries. Still think it was alternator. I could watch the volts drop like a stone right on the tester screen.
Maybe the batteries just needed some runs to get charged back up properly.
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Old 08-17-2018, 04:32 PM
  #27  
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I know it’s not a Ford problem but , my wife’s van she used to have was having a issue like this, turned out to be a cheap ass phone charger she had bought that was draining the battery over night.
No more phone chargers from the corner store!!
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Old 08-21-2018, 08:40 AM
  #28  
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I have the same truck, Im slowly learning that the cheaper the replacement parts the worse off you are. Always thought NAPA was a rip off so i was putting Advanced Auto Parts in there. WOW I SAVED $100! well the other day i was under the truck smacking the starter with a hammer to get it over. It worked but the starter which was about a year old looks like it had been trolled thru the ocean. Yes i Live in NJ but come on. I had to take a grinder to the solenoid to remove the truck cables. Lesson learned about cheap Reman products. Same story with the reman windshield wiper motor that caught fire. As we say at work "he's not good, but he's slow" ill learn my lesson one day. At least thats what i tell myself.
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Old 08-21-2018, 09:57 AM
  #29  
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it has sat a week while i have exercised another vehicle that has been sitting. Have more cleaning to do at storage so we will see .....
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Old 08-21-2018, 10:23 AM
  #30  
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Originally Posted by dhide371 View Post
I have the same truck, Im slowly learning that the cheaper the replacement parts the worse off you are. Always thought NAPA was a rip off so i was putting Advanced Auto Parts in there. WOW I SAVED $100! well the other day i was under the truck smacking the starter with a hammer to get it over. It worked but the starter which was about a year old looks like it had been trolled thru the ocean. Yes i Live in NJ but come on. I had to take a grinder to the solenoid to remove the truck cables. Lesson learned about cheap Reman products. Same story with the reman windshield wiper motor that caught fire. As we say at work "he's not good, but he's slow" ill learn my lesson one day. At least thats what i tell myself.
hate to tell you, the same 3 companies do 100% of the reman work for Napa and Advance. Only difference is cosmetics and packaging. One of the three does the remans for Ford dealers. Solenoid cap design is horrible. To get the batter cable terminal tight enough to maintain a good connection, you nearly have to break the plastic cap.
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Old 08-27-2018, 08:05 AM
  #31  
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to close out thread....


truck started perfect after sitting for over 10 days

so it was a bad alternator killing batteries
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