Quirt

Okay have a '11 Eco SCrew 4x4 with 50,000 miles. Bought it new.


This week replaced the battery for the third time. The original lasted 2 years, then the second one went out last week and I finally got it in to dealer yesterday.


Each time the Synch goes nuts and then the ISO for Charging System/Battery comes on. I drive it for the day and it recharges the battery. Then after sitting for a day or two the ISO pops back up again. When the Synch starts to act up for more than three days then I know it is time to take it into the dealer.


Got the same song/dance...nothing wrong with truck, just a bad battery. Really?


So far the dealer has covered all costs - I'm just out the battery this time. Anyone else same related issues?

Quirt

Seriously? No one else has had this issue? Interesting.

Toddman38

iTrader: (5)

Same battery here. 76k miles on truck.

Tothemax

Read up on all the other battery threads. You have something else going on. I think one of the other threads cornered it to a bad gauge cluster.

NASSTY

Shoulda bought a 5.0, i've never heard of a V8 having a battery issue.

Quirt

Thanks. If find a link or you recall name of the thread let me know. I've spent quite a bit of time searching/reading and not come across this yet. But perhaps I'm not looking in the right place.


Q

safetypin

that's weird, dude. I have a 2011, bought new, and I'm still on the factory battery. I wanted to replace it, but even when cranking to start, the battery voltage drop was within spec. have 53k and a 5.0L. charging issue??

Tothemax

Here is a thread https://www.f150forum.com/f38/need-h...-dying-313929/

gDMJoe

There is no such thing as an EcoBoost battery.

• EcoBoost is an engine assembly.
• EcoBoost is not a model, trim, cab, wheelbase, or nx4 drive selection.

As for the battery going dead - Possible causes ...

• LEAVING THE KEY IN THE IGNITION. *TAKE IT OUT BEFORE LEAVING THE VEHICLE.
• leaving devices plugged-into the electrial recepticles. *They're ALWAYS hot.
• central timer module (component of BMS) turning on by itself intermittently. *Part of the Body Control Module.
• back-up camera harness short. - http://www.fordraptorforum.com/f7/mo...harness-41847/
• faulty ignition switch. (key loose in)
• faulty shift lever micro-switch. - https://www.f150forum.com/f38/dashbo...2/#post3825056
• faulty door -closed- switch.
• BMS was not recalibrated after applying the ssm4475 - https://www.f150forum.com/f38/radio-...0/#post3951468
• software calibration issue with the BMS. https://www.f150forum.com/f38/radio-...0/#post3962167
• the sync option causing a draw/dead battery. *First check for codes in the APIM. TSB 9-14-3
• central timer module turning on by itself intermittently. *Part of the Body Control Module.
• bad ignition switch. - https://www.f150forum.com/f38/dead-b...4/#post3997086
• BCM REPROGRAM for SSM 44750. *Changes the low voltage threshold.
• the mirror cover on the passenger visor does not close causing the light to stay on - https://www.f150forum.com/f38/batter...1/#post4160675
• Ford had a recall on 2011 f150's for bcm failures. NHTSA 10V659000
• ... IPC reprogram which had fixed some trucks and they have also resoldered instrument cluster solder joints and replaced clusters to fix others. - https://www.f150forum.com/f2/another...3/#post4328042
• bad instrument cluster - https://www.f150forum.com/f38/need-h...9/#post4331565
• three wiring harnesses, one of which has been mentioned here, the C405 connection. I believe this is the rear camera, tail light harness. - https://www.f150forum.com/f38/need-h...9/#post4355870
  .
  ( up-to-date as of 18Oct2015. To be continued .....)

Quirt

Wow, thank you. I'll print this out and take to my dealer today! This is very valuable. And thank you for the clarification and feedback regarding my use of of the term Ecoboost. I'll never-ever make that mistake twice. This is a very valuable Johari Window learning moment!