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2014 Ford Focus ST3
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Discussion Starter · #1 ·
When I take vacation and the Focus sits for a week, I come back to a dead battery. Is this normal or is it time to replace the battery?

My car is early 2014 with little over 60k miles on original battery.
 

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2017 Kona Blue ST1
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Age of battery? Any electrical changes or additional aftermarket stereo equipment?
 

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When I take vacation and the Focus sits for a week, I come back to a dead battery. Is this normal or is it time to replace the battery?

My car is early 2014 with little over 60k miles on original battery.
If it's the factory battery I'd say it's had a pretty good run. Probably time for a new one.
 

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2014 Ford Focus ST3
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Discussion Starter · #4 ·
Age of battery? Any electrical changes or additional aftermarket stereo equipment?
The battery came with the car.

I have a wireless phone charger phone mount + Dash cam hardwired. Both turn on and off with the vehicle and were installed within months of getting the car in 2016.
I have Copp AP3 that is set to power off when the car turns off.

Most recent change would be installation of reverse camera which I'm powering using the power off the rear wiper assembly.

I've had this happen 3 times now in the past few years and the installation of the reverse camera was NOT before the first time the battery died.
 

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Discussion Starter · #5 ·
If it's the factory battery I'd say it's had a pretty good run. Probably time for a new one.
Yessir, factory battery.
 

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Yessir, factory battery.
It's time for that to go.

Even though the AP is "OFF" by all appearances it is still contributing to the systems normal IOD (ignition off draw) that keep several systems active but in a suspended state.

Disconnect the AP whenever you plan to be away from the vehicle for more than overnight.

J
 

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2013 Ford Focus ST1
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That's amazing battery life - I can barely get 2 years out of one here in hot and humid Florida.
 

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If you replace it yourself, make sure you reset the BMS battery age too. I think there's a combination of buttons/pedals that can reset it, but I know you can do it via FORSCAN for sure. Otherwise it won't charge it above 80%.

My car sat on a dealer lot for the first year of it's life which significantly shortened the life of my battery. I used a trickle charger when mine sat for a week to keep it charged but still died 2 years later.
 

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If you replace it yourself, make sure you reset the BMS battery age too. I think there's a combination of buttons/pedals that can reset it, but I know you can do it via FORSCAN for sure. Otherwise it won't charge it above 80%.

My car sat on a dealer lot for the first year of it's life which significantly shortened the life of my battery. I used a trickle charger when mine sat for a week to keep it charged but still died 2 years later.
To reset the BMS manually...Steps 2-4 have to be done in 10 seconds...
1) turn on lights
2) ignition on but do not start engine
3) flash bright lights 5 times
4) step on brake pedal 3 times...wait...
5) engine light will flash 3 times
6) battery light will flash twice...your done
 

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I'm about to be replace mine, had OEM since purchase in 2017, almost 4 years going strong.
To reset the BMS manually...Steps 2-4 have to be done in 10 seconds...
1) turn on lights
2) ignition on but do not start engine
3) flash bright lights 5 times
4) step on brake pedal 3 times...wait...
5) engine light will flash 3 times
6) battery light will flash twice...your done
Does anyone have the proper BMS reset procedure when you are replacing a battery in a 2014 ST with an Intelligent Key fob/push start and no keyed ignition? I’m particularly interested in what to do at step 2 above in this instance.

Thanks.
 

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Does anyone have the proper BMS reset procedure when you are replacing a battery in a 2014 ST with an Intelligent Key fob/push start and no keyed ignition? I’m particularly interested in what to do at step 2 above in this instance.

Thanks.
Push the button without the clutch; car will go into accessory mode.
 

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2018 Ford Focus ST1
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To reset the BMS manually...Steps 2-4 have to be done in 10 seconds...
1) turn on lights
2) ignition on but do not start engine
3) flash bright lights 5 times
4) step on brake pedal 3 times...wait...
5) engine light will flash 3 times
6) battery light will flash twice...your done
Do you know if this works for all Fords? Reason I ask is because I'll likely have to replace the battery in my Transit 350 xlt this spring and I'll need to reset the BMS on it.
 

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To reset the BMS manually...Steps 2-4 have to be done in 10 seconds...
1) turn on lights
2) ignition on but do not start engine
3) flash bright lights 5 times
4) step on brake pedal 3 times...wait...
5) engine light will flash 3 times
6) battery light will flash twice...your done

WTF IS THIS WITCHCRAFT!!!

How the ****, did I not know this? I need to do it on my ST!!

Oh, and thanks...
 

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Do you know if this works for all Fords? Reason I ask is because I'll likely have to replace the battery in my Transit 350 xlt this spring and I'll need to reset the BMS on it.
I don't know, but you can try it.
 

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2016 ST2, Absolute Black, Monster FMIC, Turbosmart BPV, ALEX' Shift Bushings,PCV-OCC, Innovative RMM
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More witchcraft here:
 

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More witchcraft here:
Im aware of that one, and turned off the belt minders. Darn passengers never wear belts, well, until we take the first turn, lol
 
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2014 ST3. Garrett Powermax turbo, Thermal Turboback, CPE intercooler, JBR intake, Innovative RMM
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@ddfred you're The man! Ill be doing this soon. I should have figured performing some sort of reset would be necessary on this car, just never heard it mentioned before.
 
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