Unknown problem

**Elliss** · 02-27-2019

Drove the truck yesterday for about 300 miles round trip. No problems. Today I started it and moved about thirty feet to was it and let it run while doing it. After washing, I moved it back into its spot and rolled the windows down and shut it off. A few hrs later, I put key in and turned it to on to put windows up and nothing happened, I tried to start it and it did nothing also mm3 would not power up and display in the dash is black. Disconnected the batteries for an hour and still the same thing. Batteries are both at 12.30. Help?

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**DDP** · 02-27-2019

Is the connection for the mm3 in the obd port tight? I know sometimes some people bump it and strange things happen.

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**Skywrench** · 02-27-2019

No power from batteries at all?

2016 3500 Laramie Mega DRW Aisin 3.73

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**Dwelsh** · 02-27-2019

[QUOTE=Elliss;137188]Drove the truck yesterday for about 300 miles round trip. No problems. Today I started it and moved about thirty feet to was it and let it run while doing it. After washing, I moved it back into its spot and rolled the windows down and shut it off. A few hrs later, I put key in and turned it to on to put windows up and nothing happened, I tried to start it and it did nothing also mm3 would not power up and display in the dash is black. Disconnected the batteries for an hour and still the same thing. Batteries are

Not sure what kinda key you have but is the key battery dead? Gotta love some ghost issues LOL.

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**Elliss** · 02-28-2019

The tach and speedo gauge light up, blank screen on the evic. Things that work on battery such as lights, door locks emergency flashers all work. Key on items such as wipers, radio, heater, power port do not work at all with key on. Key fobs work door locks and panic. Batteries disconnected overnight and no discharge, still at 12.30.

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**TexNeck** · 02-28-2019

Originally Posted by Elliss

The tach and speedo gauge light up, blank screen on the evic. Things that work on battery such as lights, door locks emergency flashers all work. Key on items such as wipers, radio, heater, power port do not work at all with key on. Key fobs work door locks and panic. Batteries disconnected overnight and no discharge, still at 12.30.

have you checked any fuses yet?

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**allbizns** · 02-28-2019

Is that 12.30 volts the surface charge or with load?
I've seen batteries have decent surface charge but drop out once any load is introduced like turning the key on.

Sent from my SM-G930V using Tapatalk

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**RamHunter18** · 02-28-2019

Are the batteries original?

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**Dwelsh** · 02-28-2019

Originally Posted by Elliss

The tach and speedo gauge light up, blank screen on the evic. Things that work on battery such as lights, door locks emergency flashers all work. Key on items such as wipers, radio, heater, power port do not work at all with key on. Key fobs work door locks and panic. Batteries disconnected overnight and no discharge, still at 12.30.

Seams to me like these trucks once the voltage hits a certain threshold instead of turning over slow they just wont turn ovee at all. Ive had to jump my truck off like 4 times this winter anything under 20 degrees its dead LOL. I assume youve tried to jump it off?

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