Jump to content

Dead battery and check engine light

2020gmc
 Share

Recommended Posts

Jay P Enthusiast

Jay P

Posted
Posted
2 hours ago, Steve Martin said:

Looking for details on this.  I've got a good idea, just curious your setup details if you can share.

Got one of these. Bought some wire at Home Depot (2 wires in one cable). Hooked up the + & ground. My battery maintainer came with an adapter meant for a motorcycle battery which I soldered on to the 2 wires. Just plug it in and let in charge/maintain the battery.

I work from home so I don't drive much anymore. I can go 3 to 4 weeks without doing anything and my truck will still start fine but that can't be good for the battery. All the computers the truck has drain the battery even though they go to sleep after a short time.

 

Jay

 

https://www.amazon.com/POLLAK-12-706-Plastic-Blade-Style/dp/B000BGOFCC/ref=sr_1_omk_6?crid=F4B0G3WWYSDM&keywords=7+pin+trailer+plug&qid=1648997643&sprefix=7+pin%2Caps%2C174&sr=8-6

  • Replies 83
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Tomato
Tomato

Thanks for the fix!  Tripped both P0700 and U0100 today and found this.  Those 4 bolts were only at about 15 inch-pounds, and the green indicators were up.  Talked to my service rep at the dealer to c

2020gmc
2020gmc

Lol! Thanks. Must admit this is my first gm product and it takes the prize for spending some time in service so soon. Got my truck back! They put a new battery and cleared codes. Plus they took care o

Colossus
Colossus

Well she'll not be too troublesome from here on out.  Chances are, she sat for quite a bit after being built and the battery went bad. 

Posted Images

Steve Martin Enthusiast

Steve Martin

Posted
Posted

Jay,  Thanks.  That's what I was thinking mainly.  My only concern is feeding amps backwards through the wiring to the battery through whatever harnesses and wiring are in the loop back to the battery.  It's not a direct battery connection obviously like you would hook up a charger/maintainer to.

Jay P Enthusiast

Jay P

Posted
Posted
2 hours ago, Steve Martin said:

Jay,  Thanks.  That's what I was thinking mainly.  My only concern is feeding amps backwards through the wiring to the battery through whatever harnesses and wiring are in the loop back to the battery.  It's not a direct battery connection obviously like you would hook up a charger/maintainer to.

True but that connection is there to charge/maintain an RV battery (it can also provide power for electric brakes) so it has to be direct and the wire sized properly to do that.

gemarsh Senior Enthusiast

gemarsh

Posted
Posted
15 hours ago, Jay P said:

True but that connection is there to charge/maintain an RV battery (it can also provide power for electric brakes) so it has to be direct and the wire sized properly to do that.

Good idea! I didn't think the 7-way would have power back there when truck is off. Never thought of taking a dvm or a simple test light to check.

 

My '21 1/2ton and '22 1ton both have 30 amp fuses. Still, it's plenty big for a battery maintainer.

gemarsh Senior Enthusiast

gemarsh

Posted
Posted
15 hours ago, Jay P said:

True but that connection is there to charge/maintain an RV battery (it can also provide power for electric brakes) so it has to be direct and the wire sized properly to do that.

How do you remember to unplug the connector before driving? 

 

I would backover the maintainer, destroying the maintainer, shorting out the fuse and be cruising down the road with a cord dangling behind me like a honeymoon procession car!

 

pumphandle.jpg.2a326ff99c69b089679d5ef25828d943.jpg

Steve Martin Enthusiast

Steve Martin

Posted
Posted
On 4/5/2022 at 9:26 AM, gemarsh said:

Good idea! I didn't think the 7-way would have power back there when truck is off. Never thought of taking a dvm or a simple test light to check.

 

My '21 1/2ton and '22 1ton both have 30 amp fuses. Still, it's plenty big for a battery maintainer.

so on the 7 way 1 o'clock is pos and 7 o'clock is neg.  I get 12.65 volts touching the two with a multimeter.  I'm thinking this might do the trick or what Jay previously posted will work as well.  I'm trying to understand what this is actually used for in real life.  Why would you need to hook up an inverter to the 7 way on the truck?  I'm sure there is a purpose.

Hopkins adapter.png

gemarsh Senior Enthusiast

gemarsh

Posted
Posted
2 hours ago, Steve Martin said:

so on the 7 way 1 o'clock is pos and 7 o'clock is neg.  I get 12.65 volts touching the two with a multimeter.  I'm thinking this might do the trick or what Jay previously posted will work as well.  I'm trying to understand what this is actually used for in real life.  Why would you need to hook up an inverter to the 7 way on the truck?  I'm sure there is a purpose.

Hopkins adapter.png

I'm under the impression Jay is using this idea to keep his battery fully charged with a small battery maintainer, without having to pop his hood to hook the maintainer up.

Steve Martin Enthusiast

Steve Martin

Posted
Posted
12 minutes ago, gemarsh said:

I'm under the impression Jay is using this idea to keep his battery fully charged with a small battery maintainer, without having to pop his hood to hook the maintainer up.

Yes.  I think I'll buy maybe one of these and rig it like he did with my maintainer.  I was just thinking about why this plug is for an inverter which I do have but after thinking about it further I can see where it would be somewhat handy if you don't use the plug in the truck bed.  Except for camping you'd have to be careful to keep the battery charged or be stuck in the middle of nowhere unless you have a jumper of course.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • PunchT37
      OCI, not when but why?

      By PunchT37 · Posted

      When I was there, most to all did not have an hour meter. They just did 5000 miles on regular vehicles and 3000 on police stuff. The modern oil change monitors should take into account engine hours, weather, etc. I don`t use the monitor on my stuff. I pull the stick, look at it, smell it, rub it between my fingers, etc. That`s my oci.   I have had many engines. Some bracket race. No problems doing things my way. I was in the mechanic business for 30 yrs or so. I still do things the old school way. Don`t care who laughs at me.   Understand, I was in the main shop. We didn`t do oil changes or tires. We had a service station for that. I don`t remember the hours they used for tractors, lawn mowers, etc. Something in my head says 250 hours.
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I don't know how far back vehicles had hour meters, be it driver accessible or diag accessible but was wondering if there was any rule of thumb your shop came up with in regards to an hour limit on engine oil regardless of the miles on the oil.    I know with construction or farm equipment its almost always based on engine hours for maintenance scheduling as no other metric really applies other than a seasonal time limit that one self imposes on items like engine oil.  
    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I'm not sure what to say on that mess but I will say that is an odd thing for that mechanic to speculate on as per assuming its been run out of oil a few times as the odds of that engine having instead piled up with a complete seizure would be very high if such events had actually taken place. However there is nothing saying that the oil has ever been changed although once again, what filter was on that engine as that would tell part of the story if its possible to figure out if its a factory installed filter or not. Too many items unknown and a lot of speculation, but regardless of that its one fubared mess that is mind boggling to see for a vehicle that new and its hard to imagine how it ever made it that far in life looking at the top of the engine.    His scanners, I've watched him before here and there and I'd have to say if I recall correctly that some of his scanning equipment is one or two steps up from a child's Exo Sketch 😋
    • PunchT37
      OCI, not when but why?

      By PunchT37 · Posted

      I agree. That`s a LOT of sludge for 12,000 miles. I tossed that out here since this is an OCI thread. There`s tons of people here that do not post.   I used to work on a city fleet. That includes police cars and fire trucks. Lesson is, not to only use the odo for oci. A police car has a ton of hours on the engine for the miles it shows. And, not just idling, directing traffic. They beat on these things.   Course, since it is a Kia, they were gonna use the "100,000 mile warranty" for their OCI.😉
    • AlVeron
      Manufactuer's Defect - Paint Failure - Cherry Red High Country 2021 Suburban

      By AlVeron · Posted

      CLASS ACTION SUITS?  Does anyone know if there is already a class action suit for the paint - which was to have been fixed, changed in after the 2020 GM vehicles?  Does it look like this?    Just started 3 weeks ago - No help from GM as of yet - Dealer will not assist in speaking with GM on my behalf. Confirmed it is the paint they use along with the way the put it on that causes it to fail.  Clearly a Manufacturer's Defect. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...