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Thread: MM3 Tuner With A Black Screen

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    MM3 Tuner With A Black Screen

    My MM3 tuner on my 2018 RAM 3500 has a black screen and flashes 2 red flashes, then 1 green and 2 red flashes.


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    I WILL STAND! AK Bob's Avatar

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    Re: MM3 Tuner With A Black Screen

    MM3 Tuner - Blank Screen With Flashing LED: https://www.igotacummins.com/threads...262#post214262


    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

    Sent from my iPad using Tapatalk

    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.

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    MOD watersupply189's Avatar

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    Re: MM3 Tuner With A Black Screen

    Load test each of your batteries.

    Any slight fall in voltage could cause this issue.

    Have you tried unplugging and plug it back in?


    2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, LED headlights, Lund Attitude Steps sprayed with Line-X, DRL's Activated, 35x12.50R18 Falken Wildpeak ATW3, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap and swing boxes

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    MOD watersupply189's Avatar

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    Re: MM3 Tuner With A Black Screen

    Quote Originally Posted by Jameskeen893 View Post
    My MM3 tuner on my 2018 RAM 3500 has a black screen and flashes 2 red flashes, then 1 green and 2 red flashes.
    Any update?


    2016 Ram Laramie 3500, G56, 6.7, CC, 4x4

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, LED headlights, Lund Attitude Steps sprayed with Line-X, DRL's Activated, 35x12.50R18 Falken Wildpeak ATW3, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap and swing boxes

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    nuckle's Avatar

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    Re: MM3 Tuner With A Black Screen

    I occasionally have this trouble with my MM3, I replaced both batteries, and it still happens every once in a while.

    It doesn't seem to affect the tuning or the truck, just a blank screen.

    If you unplug it and plug it back in, it comes up with no issues.


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    Bpbertolacini's Avatar

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    Re: MM3 Tuner With A Black Screen

    Quote Originally Posted by nuckle View Post
    I occasionally have this trouble with my MM3, I replaced both batteries, and it still happens every once in a while.

    It doesn't seem to affect the tuning or the truck, just a blank screen.

    If you unplug it and plug it back in, it comes up with no issues.
    The same thing with mine, nothing wrong with the tuning becomes annoying after a while.

    From what I've seen over the forum, this is a pretty common issue with most MM3 units.

    16 cummins Laramie longhorn, ccsb, 35x12.5x20 xplora mts ,tis wheels,fully deleted, pusher add a turbo kit,stainless diesel 475 5blade turbo over 63mm VGT delete turbo,manton springs, manton valve bridges,manton pushrods,ARP 625 headstuds,steedspeed t4i manifold , S&S 80% over injectors, thuren rear trackbar, kingspeed billet valve cover, revmax valve body billet plate, CCV reroute, pusher intake horn, thuren 2in level with king 2.5 front and rear, sway bar kit ,track bar and king steering damper. Air bags from airlift. 4" exhaust, fass lift pump,MM3,DRD tunes.pusher coolant reroute.

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