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Ford Focus Mk3 Battery Replacement & BMS Reset
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- Опубліковано 12 гру 2022
- #focusmk3 #bms #carbattery
In this video I replace my battery on my Mk3 focus and reset the BMS.
Not resetting the BMS after replacing the battery can have some weird affects.
Please leave any comments etc down below.
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Brilliant video! Thanks very much! Just wish I had seen it before buying a new battery!! Recently got a Focus MK3. Next day "Low battery warning" showing when starting. Being a used car I immediately went to replace the battery as I had no idea as to how old it was. New battery in. Same warning. Google search and found your video. Now all is OK! Thanks again! (With hindsight I should have searched Google first and saved myself £90 for the new battery. Lesson learned!)
Glad it was helpful! Tbh I never knew about the bms either. Was just because it started doing funny/weird things after. No worries All part of learning :-)
Cheers mate. Really helpful about the BMS bit, as mine does and I had no idea! 👍
Glad you found it helpful.. 😄
Great video pal but there’s no need to remove that air box or anything else just unclip the front plastic clips and disconnect the battery as you did and it will slide out on a angle 👍🏼I done mine yesterday
Ah thanks. When I looked into it thats how it said. oh well :) Hopefully not have to do it again for a few good years lol
If you don't have the stop start battery, maybe you can get it out.
But mine doesn't stand a chance without taking out the air box.
Great advice thanks my car went flat when left on hols, put a new battery on as it was 8 years old, it was great for a few weeks then wouldn't switch off? Was losing power, would not open, alarm going off at 3am. I also cleaned the earth connector near the battery noticed it was painted over by Ford? Cars great now thanks 😊
Glad it helped
In the states is different you will have to turn on the ignition then you will have to turn the light on (do not leave it on Auto lights), you have 10 sec to flash your bright lights five times then you have to press the brakes three times and wait about 20 seconds until the battery light flashes about three times then your BMS is set
Thanks for sharing
Thank you !
Looks like you forgot to remove the little red transport plugs out of the side of your battery. See one at 3:40
Good straight forward instructions on the reset :)
Realised that after editing the video lol 👍🏻
Thanks I’ve just done a battery swop and did not know about this feature. I have low fuel light on with plenty of fuel registered on the gauge I hope what you demonstrated will cure this? Where did learn about the reset? Cheers. .
Hi, it should do. When i did my battery I didn't know about the reset and it caused a few electrical gremlins. It was all fine after doing it.
Thank you
This small stuff with the small wires at the negative battery is not a BMS, It an explosive which cut the power from the car works together with the airbags. If you don't have this thing on an MK3 Ford that's probably means the airbags were open due to an accident, and after thatdoes not repaired well, beacus of cost saving.
Ok thanks for the info 👍🏻
Hey! What if your car doesn't have rear fog lights? But it has front fog lights.
All cars have a rear fog light.. by law.
If yours is not working I suggest replacing the bulb etc
@@FF04ORD I live in the United States and our cars don't have a rear fog light.
@greenleaf1292 oh.. it maybe another button then
Just wandering with the reset, if you press the hazard 3 times that would mean the hazards would stay on??
Or are you pressing 6 times
Thanks
I pressed it 3 times but dont remember the hazards staying on
Yes your right mine stayed on today after doing this but it still reset after I switched them off
The original battery lasted well, thankfully my Focus had a battery before I bought it so that's once less job. Only issue I have is with the car taking an absolute age to get warm and even then the temperature guage goes up and down more than it should. I've read it could be the impellor on the waterpump? Mines a 2.0tdci like yours, has yours had his issue at all?
If it goes up/down and doesn’t stay on half (near enough) it could be your thermostat. Although this cold weather doesn’t help. Mine takes aages to warm up
I was thinking thermostat which looks quite a tricky job on the 2.0tdci, I'm having the timing belt and waterpump replaced in the new year so I'll see if that sorts it. Failing that it'll be a new thermostat, I'll keep you posted on the outcome 👍
@@markmoore6264 I had mine done under warranty so sorry I can’t help with fitting. If having cam/water pump done I’d get them to do thermostat at same time as they ll drop the coolant anyways so will be cheaper in long run than having it done as a separate job
My temperature also constantly jumps and drops like clockwork. Did you solve the problem? I bought a car a few days ago, so I'm not sure if it's a defect or not. Mk3 1,6 tdci 85kw
@@jocask6735 probably the thermostat
If the battery is on its way out the stop start usually stops working.
I don’t have stop/start on mine
brother i have ford fiesta mk6 1.4 tdci my problem is that whenever i start the car battery warning light comes on the dash but if i fully press the throttle all the way to 5k rpm it starts charging and light goes offf , plz help me to solve this issue . this problem started when i removed the battery
id check the battery terminals
@@FF04ORD they r really so clean
same battery power as which came off?
@@FF04ORD what do u mean
@@motologist1917 is the new battery the same power and ohm as the old one?
Anyone tell you that you look a LOT like Alex Horne from TaskMaster?
nope but i can see why you think that lol
@@FF04ORD BTW: thanks for your video, it was very helpful!
thx mate
Glad it helped
@@FF04ORD 140€ battery solo, replaced by me.
350€ at the Ford dealer. No thanks. 😂
@@MrMase2005 a good saving 🙂
First oooh love me