If the truck sits for a week, it will not start as the battery is dead. Dealer cannot find anything drawing power. Is this a common problem? Is there something special we can look for?

70

Asked by Mar 17, 2013 at 11:54 AM about the 2008 Ford F-150 FX4 SuperCrew

Question type: Maintenance & Repair

50 Answers

Buy a new battery

1 out of 1 people think this is helpful.
70

That was the first thing we did but it made no difference. We disconnected everything from the battery and let the truck sit for 3 weeks. When we hooked up the battery again, it started without any problem.

7 out of 7 people think this is helpful.

Then you have a parasitic drain. Hard to isolate. unless you have an aftermarket alarm~anti theft, try disconnecting that or any other aftermarket device

Unhook the negative battery cable and put a test light or multi meter from the neg. terminal to a good ground and there should be no current flow

5 out of 5 people think this is helpful.

Dome , cargo, glovebox light could be on

905

Have they checked the alternater?

8 out of 8 people think this is helpful.
70

Yes they did. They are coming to get it again and see what they can find. Thanks everyone.

15,320

There are many items in new vehicles which draw power from the battery when the ignition is off. The clock is a perfect example. Any electronic device which remembers settings, including those pertaining to computer engine devices remain powered when key is in the off position. The drain has to be very very small to take a week or so discharge the battery, as a small dome light would drain the battery in a day or so. I would begin with starting the vehicle and shutting it off when it is completely dark outside. Note the dash and accessories making sure nothing stays illuminated after the twenty or so seconds it takes for everything to switch off. Check the bells and whistles installed which are seldom used. would suspect a keyless entry system problem or anti-theft problem. If the vehicle is at a dealership being checked out, remember this. The mechanics at the dealership have access to computer info subjecting quirks and seldom occurring problems for all their models. They also have charts indicating proper voltage for every system in the vehicle. If they cannot locate it, you'll have a hell of a time.

2 out of 2 people think this is helpful.

A car clock draws 0.02 amps. A decent battery would take a months to drain from that. But you are right OJ. A parasitic drain from an aftermarket device, or even a leak..a wire can leak and lose current for no apparent reason. I still say if you remove the negative battery cable and ground it there should be no flow from a test light, and a good, sensitive multi ~meter/volt meter set on 12 volts and set to measure amperage flow it should show that 0.02 amps, but that's all and I also agree with you OJ you are correct that a little dome light, say the switch in the trunk or glovebox does not kill the bulb, you won't know it it may drain overnight..a high quality battery,,say about 48 hours even. One thing: the OBD draws no power when car is not in use. Fault codes are stored while it's running and stay in the chip until scanned.

2 out of 2 people think this is helpful.
40

do you have aftermarket alarm? mine was drawing 5.2 amps while vehicle was shutdown. just a thought. my viper alarm was fried. pulled brain and sent back to viper. replaced with new brain and now fine.

4 out of 4 people think this is helpful.
15,320

One reason I suggested checking various electric devices was because of a problem I had in 2006 with my 2002 explorer. Exiting the vehicle in the evening it was completely dead the next morning. I attempted to push the vehicle out of the garage to jump start it but it would not come out of park. A called the Ford dealership for a tow, believing I had a serious problem. Explaining the situation to the service manager he stated my model ford will not come out of park gear if the battery is completely dead. I changed the battery and everything worked perfectly.

1 out of 1 people think this is helpful.
130

I have exactly the same situation with a 2012 F-150. No after market attachments; no cell phone charger, etc. If left alone for more than 4 days, battery is dead. Dealer has replaced battery once; has had in his service bays for more than 20 days; cannot "duplicate" the problem. Very much like the truck, but can not deal with the question of reliability. Squire

13 out of 13 people think this is helpful.
90

Same issue, all devices are disconnected over night but battery will still die. I connected a multimetre in series between the battery and positive cable, I'm constantly drawing 330 amps while the truck is just sitting there shut off. It's a ford problem as I've found similar issues on forums with plenty people. I'm going to pull fuses 1 by 1 until I find the mass power eater, will update if found.

9 out of 9 people think this is helpful.
50

Same issue, no remote start or aftermarket parts on it. F150 2011 fx4 5.0. Will update.....

5 out of 5 people think this is helpful.
165

Same issue with 2013 F150 STX 4x4 5.0. My problems started with the battery light coming on every once in a while, then becoming more frequent. I have been to the dealer no less that six times. After about the fifth time, and the involvement of a ford engineer, I thought they had the problem fixed (replaced a wiring harnes). That is until about 2 months later. The truck sat over night and was dead the next morning. Took it to dealer again, and they replaced the battery. Went about a week and a half without any problems. Now the battery light is coming on again. If anyone discover a solution, please keep us updated!

9 out of 9 people think this is helpful.
110

I have had the same problems with my 2013 F150, in fact it is in the shop right now. I was told today that a sensor in the shift column was bad and that when the truck is parked and turned off it sometimes doesn't know to shut everything down. They are replacing it tomorrow. Hope it works because I am tired of this intemittant problem and using a jump box to get to work on a new truck

11 out of 11 people think this is helpful.
15,320

Vehicle manufacturers have pushed the limit on the 12 volt system for twenty years. What needs to be done is go to a 24 volt system and simplify the electrical system. Of course, in the back of their mind they can hope it holds for one day longer than the warranty so the dealership can such a grand out of the owner, or sell a new vehicle.

80

Same problem 2006 F150. First I load tested battery. Then validated that even with another good battery the same thing occurs. Withing a few days, battery is below 12.2 volts (or less than 50% capacity). I have no aftermarket accessories. I have used an ammeter to check the current draw at every fuse and find three that draw .01A which is normal and not enough to drain a battery that quickly. For a drain that quick, it must be pulling about .25A or more. I'm stumped.

5 out of 5 people think this is helpful.
80

Same problem 2006 F150. First I load tested battery. Then validated that even with another good battery the same thing occurs. Withing a few days, battery is below 12.2 volts (or less than 50% capacity). I have no aftermarket accessories. I have used an ammeter to check the current draw at every fuse and find three that draw .01A which is normal and not enough to drain a battery that quickly. For a drain that quick, it must be pulling about .25A or more. I'm stumped.

3 out of 3 people think this is helpful.
70

I have a 2013 F150 with 10,000 miles on it. Been in the shop 4x with this problem, which just started happening a couple of weeks ago. Dealer has changed out two batteries and a power module with no luck fixing the problem. No aftermarket electrrical devices have been added. The only thing I have noticed is the dash lights are on when I go to get in the truck. This is before I unlock it or open the door.

7 out of 7 people think this is helpful.
165

Update: I filed a lemon law claim on my truck. I sent it in for the final repair, and the dealer said there was nothing wrong with it and to come pick it up. The thing is sitting in my driveway dead as a door nail right now! And to top it all off, I just recieved a call from Ford saying they rejected my claim for a new vehicle. I am going next week to speak with a lawyer about the situation. Hopefully then I can get some results. I have been a Ford fan all of my life, but I will never buy another Ford product as long as I live.

7 out of 7 people think this is helpful.
20

I have the same problem. Battery goes dead after 1 day of sitting. Have replaced the battery the problem persists. We can hear a small whirring sound like a small electric motor or fan running but have not been able to isolate the sound. On this note, it is ridiculous that car manufacturers don't have built-in isolation switches so that electrical problems can be easily isolated. The cost for this may be $100 to $200 per vehicle and that is being high.

2 out of 2 people think this is helpful.
20

2015 Explorer Sport with dead battery three times now after being left at airport. One new battery so far via my warranty. Towed from airport today and at dealership now. No aftermarket with the exception of DVD player installed through the dealership prior to taking ownership. Not acceptable for a brand new car!! Stranded alone in an airport parking lot now twice in the cold and rain. Love my explorer but this must be corrected.

40

I've seen this problem both on Explorers and Edges. The culprit was the shift lever malfunctioning. Even the vehicle was physically in park, the computer did not recognize that and the vehicle wouldn't shut everything down. The result was a dead battery the next morning. It's occurred intermittently making it harder to diagnose. Good luck everyone!

4 out of 4 people think this is helpful.

Floor shifters on edges have been a concern had one myself, ford tech

10

2013 F150 - Mostly same issue as all above. Anyone else find a resolve or find a way to convince the Dealer that there really is an issue? Dealer just said they did Sync updates to the radio since those have caused issues - not sure if this fixed it for anyone else, but I guess I'm a skeptic. I had this happen as short as over night, with battery @ 7volts in the morning. More often it happens every few weeks or more. Car at most sits for a few days. Dealer said they did 2 load tests, checked alternater, starter, battery - couldn't find anything. Ugh.

10

Wow, had we known...We are currently dealing with a 2014 F150 Stx. Bought it new in June of last year. If it sits for 3-5 days, it'll be dead. Ford has replaced 2 batteries, a starter, and an ignition sensor. Now we are dealing with the BBB. Ford says it's a parasitic drain from the aftermarket brake controller, but we've already disconnected it, and it still died! Plus it was paid for by Ford and installed by their accessory shop as part of our purchase agreement. It was also tested and not found to be draining! On to arbitration. You can have Ford because we don't want it!

1 out of 1 people think this is helpful.
10

I am having the same problem as described above with a 2014 F150 XLT. Replaced the battery and it lasted about a week and a half. The last two times, it was so dead, the remote wouldn't unlock the door. I bought a jump box and, when I use it, it kicks right off. I wish I had kept the 2012 Fi50 XLT that I traded for it.

1 out of 1 people think this is helpful.
15,320

Your 2014 should still be under warrant. I recommend you bring it to the dealership to at least document the problem with Ford.

1 out of 1 people think this is helpful.
80

watch the dash lights, floor shifters usually biggest culprit but also have seen column shifters do the same thing. When vehicle is put into park the PCM does not see that due to faulty park sense switch which is part of the shifter assy. When PCM thinks vehicle is not in park networks will not go to "sleep" causing the battery draw. First indication is intermittently the dash lights will be on without key in ignition. Also a DLC breakout box will show activity on the network. Repair is shifter replacement

8 out of 8 people think this is helpful.
80

Same problem here, 2014 F150 FX2. I replaced battery with Optima yellow top after I found OEM battery dead one Sunday morning. After 3 days the battery was dead again. Took to dealership who had it for a week, found amp draw to be nominal (.05) and decided the Optima battery I put on was bad. They made me purchase a new Motorcraft battery since I had traded the OEM one to buy the Optima. Well, 3 days later we are dead again. What is the answer if Ford cannot fix this problem under warranty? Apparently from previous posts, having a new vehicle, under warranty, that cannot be used reliably isn't a reason for Ford to act. Do I just allow them to keep the vehicle with repeated attempts to repair until the warranty expires when their responsibility is over???

1 out of 1 people think this is helpful.
80

Just wanted to add my two cents worth. I have the same battery drain issue with a 2014 F150 FX2. Truck has been to dealer three times, 5 days each first two times, 3rd day as of today, on this, the 3rd visit. 1st visit they replaced battery, 2nd visit they re­programmed BCM, now they are going to replace 3 wire harnesses (1 of which is the rear camera harness I've read about on some forums). Looks as if I'm in for the long haul as have many others with this problem. Thanx for the insight this forum has given me!

1 out of 1 people think this is helpful.
70

Ditto on our 2010 F150 Crew Lariat. Battery dies after sitting a few days. Dealer said if there is no fault code there is nothing they can do. Guess the Ford uses monkeys for mechanics...see a code and replace what the fault code tells you to replace. We've had problems with the headlights flashing intermittently when the truck is parked. Key fob did not work to unlock the doors, memory seat did not work, lamps on the instrument cluster all come on. Truck will start, but not come out of park. Pulled the negative battery cable and reconnected and everything is back to normal. Dealer has had the truck for a week and says they can not get the problem to repeat. Service advisor says he has been driving the truck every day and it works fine. IDIOT....it happens when the truck sits. He said to just have it towed in next time it fails. Probably not going to be a next time. Going to be done with Ford.

10

Glove box door vibrates open just a tiny bit, can see the light comes on, shut it twice but it will crack open again...drained battery in four days and had to call road-side emergency service for a jump. This be the same problem with all the above issues...

1 out of 1 people think this is helpful.
70

2010 F150 does not have lights in either the glove box or center console.

80

Ford has found my problem and corrected it. After three trips to the dealership, they consulted with Ford and found the problem to be with three wiring harnesses that apparently get wet & corrode. One was the harness under the tailgate that is part of camera wiring. Anyway, repair was made about three weeks ago & so far no more problems.

6 out of 6 people think this is helpful.
70

Did the truck computers report and fault code?

1 out of 1 people think this is helpful.
80

No, no codes were present. Dealership couldn't even see any amp draw in excess of normal (.oo4 amps, I believe). They had the car for several weeks and verified there was a battery drain daily, but couldn't locate it. I insisted they reach out to Ford Mfg. for help, which they were hesitant to do.

70

Good information to share with my dealer. I am on the Ford F150 forum and supposedly they are going to help get the problem figured out. One more thing to check. Interesting the they were only able to measure 4 milliamps, but yet the battery was still draining.

1 out of 1 people think this is helpful.
80

I agree, I sometimes (always) wonder if the dealership was being completely honest with me on their findings. I post also on the F150 forum, actually about this same problem as it was happening. Good luck with getting your situation resolved.

10

I have a 2013 Ford F150 XLT extended. I used to get this problem about 4 times a year. It being that intermittent made it really hard to troubleshoot. Yet such a pain when you try to use your car you end up stranded. I haven't had the issue in about 8 months so I THINK its fixed. I'm electronically inclined and was convinced there was some draw on it when parked, but obviously hard to figure that out, especially when it's intermittent. I had a suspicion it was the radio/Sync/Bluetooth. The last thing they did was a firmware update on the radio and the issue hasn't come back (knock on wood). I would have that checked or force them to do it to rule that out.

1 out of 1 people think this is helpful.
70

My exact feelings. 4ma draw is not going to take a battery down that quickly. I know car batteries are designed for cold cranking amps. Not sure what the reserve rating is on Motorcraft batteries, but would expect the reserve capacity to be about an hour or so. If I understand it correctly, the reserve is rating on a 25 amp continuous draw, measuring the time it take to get the battery voltage to 10.5V. Do the math. It would take weeks for a 4ma draw to kill the battery.

70

TSB 13-9-22 for SYNC issues for model year 2012-13.

5 out of 5 people think this is helpful.
10

I just repaired a 2012 F-150 with this concern. Only a 20 mA draw when I had the meter hooked up in-line. The truck would be dead the next morning. Have your mechanic check for corrosion in connectors C405 and C4000 in the rear of the vehicle. If either circuit has corrosion, replace both ends of the connector and the issue will most likely be resolved. My vehicle had corrosion in C405. If your truck does not have a back-up camera and is out of warranty, you can use replacement 8 pin pigtails WPT-1045 and WPT-1136 to repair the 7 wires used in that 16 pin C405 connector. Ford does not offer replacement pigtails for that circuit, so a little improvisation is needed. I hope this helps. Steve

1 out of 1 people think this is helpful.
240

It's a 36 dollar fix. Easy to do. Check out my post. http://www.cargurus.com/Cars/Discussion- t38913_ds606175

6 out of 6 people think this is helpful.

well i am having a draw and have isolated it to the wiring loom that goes from the batt. around the batt. between the batt. and the right fender.i put a test light in line on the + side of the batt. pulled fuses and relays. the only result is that when #21 is pulled the test light blinks. i left it out and the next day the batt. was dead. the batt is a month old and is 700 amp.driving me crazy trying to find it. its a 2005 f 150 4.6 4x4 auto. man i need help. i'm hoping one of you come up witth a fix and let everyone know.

10

Okay... After reading all this with tall the unrelated questions and answers, what was the final solution? !!

1 out of 1 people think this is helpful.
80

My solution was mentioned in a previous post here. It's been 6 months with no recurrence. Sorry if you felt it was unrelated to the original post, I was just attempting to help others that may be experiencing the same symptoms.

Same problem. Ford F150 2012 Ecoboost. dead next morning everytime...No aftermarket, no lights on....Shifter is on console...First 5 Frods I had got 250000 no problems and were still running when sold. The last two have been nightmares and Ford skirts the problem. I am now looking at several competitor SUVs. Sorry Ford you have lost a long time customer. Would have cost you maybe a couple thousand to help me in these situations but you get an estimated 15000 profit on each SUV...Now you get no profit from me or my family ever again - not good business sense..

240

This is the fix!! There is a small switch that goes bad in the center console. When the switch goes bad, the computer thinks the truck is still in drive even though it is physically in park. Because if this, the computer never shuts off and you get a dead battery. The switches from Ford are terrible but the new switches I sell are higher quality and should last the life of the truck. I've sold over 70 and never had one that didn't fix the problem. http://m.ebay.com/itm/162075698977? _mwBanner=1

1 out of 1 people think this is helpful.

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