Thanks: 27
Likes: 42
My dash lights started going crazy today while driving.
I shut the truck off at home, and now it won't start.
I turn the key over, and the dash starts freaking out again.
I noticed the tuner will not even come on.
The picture is of the lights that are flashing all while driving.
Sent from my iPhone using Tapatalk
Perform a complete system scan of all modules, and let us know what trouble codes you have.
Does the engine turn over?
2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.
After sitting for a bit, the truck turned over as usual, and I did a DTC scan through my RaceME tuner and got these codes.Originally Posted by AK Bob
Sent from my iPhone using Tapatalk
After start-up, I noticed the battery voltage said 12v for about 10 seconds, then went to 13v for a few seconds, then 14v for a few seconds, and now back at 13v and holding.
Maybe my alternator is going bad.
Sent from my iPhone using Tapatalk
Test your batteries and charging system.
2016 Ram Laramie 3500, G56, 6.7, CC, 4x4
2016 RAM 3500 4x4 Laramie Crew Cab ,G56
Low battery voltage can cause erroneous trouble codes.
I would start with having both batteries load tested.
Once you have ruled out low battery voltage, you must scan the body control module for trouble codes.
See the attached information on U0121.
Last edited by AK Bob; 11-30-2023 at 11:46 PM. Reason: Added attachment
2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.
As said above, check voltage and connections, both positive and check all your grounds.
That said, 1.5 years ago, my 13 started throwing odd codes and the occasional bong.
It would kick on the TPMS light ( it doesn’t have tpms).
This continued for several months.
It then went crazy with the dash turning off and back on while driving.
It threw almost every light on and off and told me it was ready to start while driving down the road.
It ended up being bad CAN wires to the engine ECM.
Keep us updated on what you find.
2016 Ram Laramie 3500, G56, 6.7, CC, 4x4
2016 RAM 3500 4x4 Laramie Crew Cab ,G56
IGOTACUMMINS thanked for this post
Where exactly were the wires bad?
I'm having issues with mine and can't figure it out.
EFI Tuned Full Fueling, Exergy 12mm stroker CP3, Evilfab kit, S474 Turbo, BBi Stage 1.5, Pusher Big Mani, G&R billet grid delete, Fire Ringd Head, port & polished, 110 springs, 625+ studs, fleece coolant bypass, hamilton push rods, Banks Intercooler, Big Charge pipes, Fleece filter delete, 165 AirDog, beans sump, 4” stainless straight pipe, Custom aluminum 5” Driveshaft, Custom 5” Intake, CCV Deleted, Hytec covers, 68RFE aftermarket Vb/tc, Arb air locking front diff, 33x13.50x20MTs
IGOTACUMMINS thanked for this post
An update on the issue.
I haven't had a chance to fool with the truck much, as work has kept me busy.
When I started the truck, I noticed that the voltage was around 11.5v for about 40 seconds after start-up, then slowly climbed to 14v.
The truck will sit for days at a time without me starting it or moving it.
I'm thinking it's going to be batteries.
Sent from my iPhone using Tapatalk
Posting Permissions
Register To Reply
Bookmarks