Average life of the stock battery?

[Msfitoy]

It applies to any vehicle with a variable voltage system. My 2012 Frontier is no exception

But then the mounting point (mentioned above) is wrong according to Ford?

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[LawnMM]

That is the correct way to do it. When you have the charger with negative connected right there the charger will go through the BMS system. If you just connect it all at the battery itself it skips the BMS and the BMS doesn't even see it.

Same thing goes for any aftermarket accessories that are added on. They want you to go through a chassis ground instead of directly to the battery negative. This helps the BMS detect any loads so it can adjust accordingly in the correct manner in order to keep the battery where it should be and give the appropriate amount of amps and volts

I'm not understanding how that's correct either. The BMS monitors the battery itself for its state of charge constantly.

@airline tech did a bunch of super in depth posts on this. If the BMS is constantly monitoring voltage, draw, state of charge...

What does it matter? It should detect the draw on the battery regardless of where the ground is connected and adjust the charging accordingly.

Now if you're CHARGING the battery as Misfit is doing I see an issue, potentially, because it may not detect the inbound current. Yet, you're suggesting this applies to accessories like lights, or a winch that draw power not send it as well.

I'm not seeing how that would be the case.

 

[Frenchy]

I'm not understanding how that's correct either. The BMS monitors the battery itself for its state of charge constantly.

@airline tech did a bunch of super in depth posts on this. If the BMS is constantly monitoring voltage, draw, state of charge...

What does it matter? It should detect the draw on the battery regardless of where the ground is connected and adjust the charging accordingly.

Now if you're CHARGING the battery as Misfit is doing I see an issue, potentially, because it may not detect the inbound current. Yet, you're suggesting this applies to accessories like lights, or a winch that draw power not send it as well.

I'm not seeing how that would be the case.

It's only going to detect to draw that's going through the sensor. If the draw is not going through that sensor then it's not going to be detected by the system at all. That is why you want the ground of said accessory to be on the chassis ground.

 

[tgRanger]

I’m not sure who’s correct but hope we can get it figured out so I can make the changes if need be. The picture I posted of a my ground wire grounded to the chassis was for my Deltran Battery Tender Plus quick disconnect that I’ve been using for almost 5 years.

But I recently had Amp Research Power steps professionally installed and they connected the ground to the Neg on the battery. Also there is a YouTube video of the same Amp steps installation and he too put the neg on the battery.

@j0shm1lls

 

[Frenchy]

I’m not sure who’s correct but hope we can get it figured out so I can make the changes if need be. The picture I posted of a my ground wire grounded to the chassis was for my Deltran Battery Tender Plus quick disconnect that I’ve been using for almost 5 years.

But I recently had Amp Research Power steps professionally installed and they connected the ground to the Neg on the battery. Also there is a YouTube video of the same Amp steps installation and he too put the neg on the battery.

@j0shm1lls

If you notice the side it is connected to it is considered on the chassis side of the BMS sensor. That makes it where the BMS is still going to read the draw from the steps. Make sense?

 

[tgRanger]

If you notice the side it is connected to it is considered on the chassis side of the BMS sensor. That makes it where the BMS is still going to read the draw from the steps. Make sense?

So then my and Josh’s install is correct?

 

[Frenchy]

So then my and Josh’s install is correct?

Without seeing pictures it can be hard to say for Josh. Your install is ok

 

[airline tech]

I'm not understanding how that's correct either. The BMS monitors the battery itself for its state of charge constantly.

@airline tech did a bunch of super in depth posts on this. If the BMS is constantly monitoring voltage, draw, state of charge...

What does it matter? It should detect the draw on the battery regardless of where the ground is connected and adjust the charging accordingly.

Now if you're CHARGING the battery as Misfit is doing I see an issue, potentially, because it may not detect the inbound current. Yet, you're suggesting this applies to accessories like lights, or a winch that draw power not send it as well.

I'm not seeing how that would be the case.

From The Manuals: (Note)

NOTE: No loads should be connected directly to
battery NEG B- post as that would by-pass Battery
Management Sensor generating false state of
charge (SOC) readings.
Ford Ranger vehicles are equipped with a feature
called Battery Management Sensor (BMS). This
system measures the battery load in order to
efficiently charge the battery while improving fuel
economy and emissions.
It is important to ensure any additional electrical
load or accessory is properly grounded to the
vehicle’s body, in order for the system to identify
the additional load. If a connection is made to the
battery negative terminal, the Battery
Management Sensor will not identify the load or
charge. This may cause the battery to be
undercharged and consequently not able to
re-start the vehicle.

 

[tgRanger]

Without seeing pictures it can be hard to say for Josh. Your install is ok

His install pic is below mine and connected in the same spot.

Thank you for clarifying Chris.

 

[airline tech]

If you notice the side it is connected to it is considered on the chassis side of the BMS sensor. That makes it where the BMS is still going to read the draw from the steps. Make sense?

Sorry, multiple posts all at once:
Yes, this, as long as the sensor can pick up the current flow, this (As Pictured Above) or an actual Body Ground connection is needed.

If you use the actual (Negative Post) you are By-Passing the sensor, now how much of a difference does it make or is it truly important. It mostly depends on the extra load you are adding.
We are already (BLESSED) with the BMS system and fuel economy induced operation, undercharging the battery as it comes from the factory, by passing the sensor only makes it worse.

 

[LawnMM]

Aren't we splitting hairs here? Since the battery itself is grounded to the chassis ground...

Freaking electrical stuff is like modern day sorcery sometimes ?

Guess I need to move a loop terminal this weekend ??‍?

 

[Rinn69]

Just passed the 5 year mark and still on the original battery...

PS-I unplugged the BMS sensor 3+ years ago and also top it off with a Battery Tender (grounded to the chassis) when I get the "low battery" warning or if the door handle sensors don't work. 33,500 miles.

 

[pismo1]

Without seeing pictures it can be hard to say for Josh. Your install is ok

Thanx,that where I put the negative for my Battery Tender.Good to know its right.I thought when I attached it it would be on the chassis side of the BMS sensor and would work properly.For a winch I would bolt it to the chassis as you have shown.

 

[Fx4ranger2019Larait]

If using NOCO 10 battery charger+maintainer should I connect negative to chassis ground?

 

[RedlandRanger]

Just passed the 5 year mark and still on the original battery...

PS-I unplugged the BMS sensor 3+ years ago and also top it off with a Battery Tender (grounded to the chassis) when I get the "low battery" warning or if the door handle sensors don't work. 33,500 miles.

I'm at 5 years and a month, never changed anything related to BMS or charge capacity and still have the original battery and thus far, I've never gotten the "low battery" warning. I did have to replace my Fob batteries though!

Now watch - now that I've said that I will start getting the warning today.....

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