12 Volt bed outlet - what can it safely power?

[Shelbyv8]

It only stays if it detects a load.

Sponsored

 

[Tbone289]

It only stays if it detects a load.

If you're saying that the 12V accessory circuit stays active after shutdown only if it detects a load, all I can say is that is not the case with my Maverick. Mine can have no accessory load at shut down and remain active until the timeout.

 

[MakinDoForNow]

I believe you are right, or at least the ignition needs to be on to get power to the bed plugs in my 25 XL - No ignition on = no power to the rear bed plugs - I just tested that hypothesis.
Power is already off by the time I exit the vehicle to check the voltmeter.

It does make me wonder why the manual would state to not drain the battery by leaving devices plugged in overnight or when parked when there is no power to the plugs unless there are model trim/year differences...

I have the 25 XL and @El Kabong has a 26 Lariat...

If the 12v is drawing current when truck is turned off the 12v circuits inside and outside will remain active as long as the battery doc is 12.1 volts or higher (for a max time of 90 minutes). If the circuits are not active when truck is turned off the the circuits will not be active until truck is turned on.....

 

[2024ash]

It only stays if it detects a load.

My 24 Lariat does not remain on, even with a load.

If you're saying that the 12V accessory circuit stays active after shutdown only if it detects a load, all I can say is that is not the case with my Maverick. Mine can have no accessory load at shut down and remain active until the timeout.

My 24 Lariat shuts down all 12v accessories with or without an electrical load.

All I can speak to is how my own vehicle behaves.
I have a fully charged battery.
The 12 volt plugs in the rear are powered with the ignition on but immediately terminate on key off shutdown. Everything on my XL shuts down within 30 seconds of the key off.

I did not have a load on the 12 volt bed plugs, as I just used a voltmeter to determine if voltage was present, it was, and after shutdown, it wasn't.

It's possible that power is maintained when there is a load on the circuit until the battery is too low to support the load, or via a time sequence that you noted.

24 Lariat, I experience the same. Interior USB charging, interior 12v outlet, and 12v rear Flexbed all power down within seconds after turning off the ignition.

I guess the question is, why is there so much variation? I'll rehash the assertion I've made elsewhere: Issues like this and other notable omissions and shortcomings with the EVIC and infotainment indicated Maverick programming is totally underdeveloped. Probably intentionally so, since Ford could easily copy programming from other models...

 

[Tbone289]

My 24 Lariat does not remain on, even with a load.



My 24 Lariat shuts down all 12v accessories with or without an electrical load.



24 Lariat, I experience the same. Interior USB charging, interior 12v outlet, and 12v rear Flexbed all power down within seconds after turning off the ignition.

I guess the question is, why is there so much variation? I'll rehash the assertion I've made elsewhere: Issues like this and other notable omissions and shortcomings with the EVIC and infotainment indicated Maverick programming is totally underdeveloped. Probably intentionally so, since Ford could easily copy programming from other models...

What is the voltage of your 12V battery when you experience the shut down? Low voltage should be the only thing overriding your accessory timer.

 

[2024ash]

What is the voltage of your 12V battery when you experience the shut down? Low voltage should be the only thing overriding your accessory timer.

Usually reads 14+ on the USB outlet I isntalled. I can't imagine the 12v battery would be low coming off a lengthy drive. It also happens consistently every time so I figured it's a feature and not a bug. I suppose the 12v battery could be on its last legs?

 

[Tbone289]

Usually reads 14+ on the USB outlet I isntalled. I can't imagine the 12v battery would be low coming off a lengthy drive. It also happens consistently every time so I figured it's a feature and not a bug. I suppose the 12v battery could be on its last legs?

I wouldn't suspect so from that voltage, but I don't know what else would cause it to shut off.

 

[MaverickDragon]

Yours is the first case I've seen of a Maverick that ignores the accessory timeout with a fully charged 12V battery. It's not necessarily the first case of it, just the first I've seen. Door locks should have no influence on this.

With the doors locked or unlocked after shutting off the engine, I can run a 12V accessory from the accessory bed wiring after the key is removed for the length of the timeout or until minimum SOC, whichever comes first. At any time, I can turn the key to on again to reset the timer.

Actually, there are others on this thread with the same observation that I had.
Again, the only thing I haven't tried is having something actually using power from the 12 volt bed plugs at the time I turn off the truck. There is no power to them after the vehicle is turned off when they were unused at the time of shutdown.

It's not clear if you have something powered or not when you shut your vehicle down.
If so, your truck may be like mine.

It's not a battery issue, as my battery was at ~ 95% SOC when tested.

 

[Tbone289]

It's not clear if you have something powered or not when you shut your vehicle down.
If so, your truck may be like mine.

I have an education in electronics. It's clear to me that there are zero accessory loads when I turn the ignition off and the timer begins. When the onboard systems go to sleep after ~25 minutes, the current draw on the battery is ~10mA. With that level of parasitic draw I can assure you there are no accessories on or plugged in. After ignition is turned off with no load, I can then power accessories off the 12V accessory circuits.

If there were other owners in this thread who have experiences similar to yours at the time I made that statement I'm sorry, I missed it. However they don't agree with the experiences I've had with my '24 EB Maverick.

 

[MaverickDragon]

If there were other owners in this thread who have experiences similar to yours at the time I made thats statement I'm sorry, I missed it. However they don't agree with the experiences I've had with my '24 EB Maverick.

No reason to be sorry.
See Post #34..
It seems apparent to me that people seem to have had different experiences with their vehicles bed power.

I don't doubt what you say is true, but I also don't doubt what is plain to see in my case.
I know how to use a voltmeter, and I'm no stranger to electronics either, as I build and install solar power systems. Measuring voltage at a power outlet (or observing none) isn't a challenge.

After ignition shut off with a charged battery, there is no voltage at the bed plugs that had power to them a minute before with the ignition on. There was no load at the time, and I suspect that might be the difference. Perhaps not. I'll get around to testing that hypothesis when I have an opportunity, but I have no plans nor need to use the bed plugs.

 

[Tbone289]

No reason to be sorry.
See Post #34..
It seems apparent to me that people seem to have had different experiences with their vehicles bed power.

I don't doubt what you say is true, but I also don't doubt what is plain to see in my case.
I know how to use a voltmeter, and I'm no stranger to electronics either, as I build and install solar power systems. Measuring voltage at a power outlet (or observing none) isn't a challenge.

After ignition shut off with a charged battery, there is no voltage at the bed plugs that had power to them a minute before with the ignition on. There was no load at the time, and I suspect that might be the difference. Perhaps not. I'll get around to testing that hypothesis when I have an opportunity, but I have no plans nor need to use the bed plugs.

Post 34 was after my comment that yours was the first I've seen of this issue, so that is still true.

I don't doubt what you're seeing at all either, but it would be a huge problem for me. On nearly every trip I take over an hour or so I power a 12V cooler/freezer in the bed and expect it to run any time I'm out of the truck until the timer runs out. I've probably done that 50(?) times and it has never failed to work. I have a power station I can use to run it longer if need be, but I haven't had to so far.

Anyway, let us know what you find when you have the time. I'm curious. I may do some time lapse video or photos to show what I'm seeing as well.

 

[MakinDoForNow]

My 24 Lariat does not remain on, even with a load.



My 24 Lariat shuts down all 12v accessories with or without an electrical load.



24 Lariat, I experience the same. Interior USB charging, interior 12v outlet, and 12v rear Flexbed all power down within seconds after turning off the ignition.

I guess the question is, why is there so much variation? I'll rehash the assertion I've made elsewhere: Issues like this and other notable omissions and shortcomings with the EVIC and infotainment indicated Maverick programming is totally underdeveloped. Probably intentionally so, since Ford could easily copy programming from other models...

If the soc of the 12v is below 12.1 volts then the DELAY OFF on the power points becomes INACTIVE!!! = Time for smart charger (noco g5 in my case). Plan on several days for sulfate and optimization completion. Does not have to be continuous but on and off will take longer (couple weeks?) and will vary.

 

[SafetyGuy]

Post 34 was after my comment that yours was the first I've seen of this issue, so that is still true.

I don't doubt what you're seeing at all either, but it would be a huge problem for me. On nearly every trip I take over an hour or so I power a 12V cooler/freezer in the bed and expect it to run any time I'm out of the truck until the timer runs out. I've probably done that 50(?) times and it has never failed to work. I have a power station I can use to run it longer if need be, but I haven't had to so far.

Anyway, let us know what you find when you have the time. I'm curious. I may do some time lapse video or photos to show what I'm seeing as well.

Good day

I am in the same boat as you, as in our power stays on to the 12 volt ports inside and outside the truck till the 70/90 minutes timer runs out...I may have to sit and stare at my truck to see what the actual time is!

That said, I do have one power port in the left rear of our truck and on the other side I installed the voltage meter/USB power port.

The only loads I have that are 12 volt power port connected are my 12 volt indicator in the cab port and the little volt meter in the truck bed...not a lot of load, that is for sure.

My power stays on for the normal errr...."my normal" 70 minutes at least, after ignition power is removed.

Same as you, we have a cooler plugged into the rear power port and it keeps running until the timer shuts down the 12 volt power to the outlets.

Anyone can see if their ports stays on if the get a volt indicator like a lot of us already have (as part of the testing done to prove MM's light tricks really work to keep our batteries topped up.

I feel, and this is just my feeling/thought...if my truck did not do this (where it shuts down immediately at ignition off), I would wonder why?

My background is aircraft servicing, maintenance and repair, but to be brutally honest, the electrical side was not my forte. It was not my gift but have many other area's of expertise that made up for this fact. ;-)

So that is why I tend to try to logically troubleshoot a system. Some here have fully charged batteries and have not messed with ForScan to change settings and have reported no rear 12 volt power immediately upon shutdown...we can only assume then, that their trucks are not following the same programming we are experiencing.

This is what I am going with until someone can check and maybe figure out why their trucks are acting differently. And then let us know, I hope! I am a curious person.

I know I am glad mine works as it does, which is what I feel is the way most of our trucks manufactured act...as long as their 12 volt batteries are fully charged and in good condition.

Have a great day,

Andy

 

[MaverickDragon]

I don't doubt what you're seeing at all either, but it would be a huge problem for me. On nearly every trip I take over an hour or so I power a 12V cooler/freezer in the bed and expect it to run any time I'm out of the truck until the timer runs out. I've probably done that 50(?) times and it has never failed to work. I have a power station I can use to run it longer if need be, but I haven't had to so far.

Anyway, let us know what you find when you have the time. I'm curious. I may do some time lapse video or photos to show what I'm seeing as well.

Fortunately, you don't have a problem, as your vehicle works as intended.
I'm not so sure my vehicle woks any differently, as you likely have your cooler powered when you shut down the truck, and that may be the difference I intend to test.

I didn't see it mentioned if you did the opposite experiment - Shutting down your truck without anything being powered on the bed plugs and then testing to see if you have voltage.

BTW - Apologies to the OP for my contributions running this thread off in a different direction.
It seemed to be related at the time.
Powering any appliance from the vehicle's battery needing to start the car may be convenient, but using another semi-independent battery source as has been suggested to me is a safer alternative, and may contribute to a longer battery life, as lead acid batteries, be they flooded or AGM., are not particularly fond of being significantly discharged.

 

[MaverickDragon]

Good day

I am in the same boat as you, as in our power stays on to the 12 volt ports inside and outside the truck till the 70/90 minutes timer runs out...I may have to sit and stare at my truck to see what the actual time is!

That said, I do have one power port in the left rear of our truck and on the other side I installed the voltage meter/USB power port.

The only loads I have that are 12 volt power port connected are my 12 volt indicator in the cab port and the little volt meter in the truck bed...not a lot of load, that is for sure.

My power stays on for the normal errr...."my normal" 70 minutes at least, after ignition power is removed.

Same as you, we have a cooler plugged into the rear power port and it keeps running until the timer shuts down the 12 volt power to the outlets.

Anyone can see if their ports stays on if the get a volt indicator like a lot of us already have (as part of the testing done to prove MM's light tricks really work to keep our batteries topped up.

I feel, and this is just my feeling/thought...if my truck did not do this (where it shuts down immediately at ignition off), I would wonder why?

My background is aircraft servicing, maintenance and repair, but to be brutally honest, the electrical side was not my forte. It was not my gift but have many other area's of expertise that made up for this fact. ;-)

So that is why I tend to try to logically troubleshoot a system. Some here have fully charged batteries and have not messed with ForScan to change settings and have reported no rear 12 volt power immediately upon shutdown...we can only assume then, that their trucks are not following the same programming we are experiencing.

This is what I am going with until someone can check and maybe figure out why their trucks are acting differently. And then let us know, I hope! I am a curious person.

I know I am glad mine works as it does, which is what I feel is the way most of our trucks manufactured act...as long as their 12 volt batteries are fully charged and in good condition.

Have a great day,

Andy

I doubt you need to troubleshoot anything, as your vehicle seems to be operating normally.
I think mine is as well. There is no point from a programming perspective to keep power on with a timer when nothing is using power.
It is unlikely to make a difference as to how significant of a load is on the 12 volt system, just that it has one to keep the power on with the timer.

I expect thst when I hook up a test light to my pigtail adaptor that I'll have power when I turn off the truck.. I'll post results either way when I have something to report.
Cheers

Sponsored