Good Morning!

I have 2014 Sante Fe Sport. It won't start. I get half a crank and then the dash lights up and seems like it's having a seizure. All the dash lights are blinking and acting crazy. I replaced the EMS Module to see if that would help but no that didn't work.

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Any help would be appreciated

 

It does appear to have a connection problem.
The battery cables where they connect to the engine need to be checked and make sure they are clean and making good contact.
The best way to do this is to remove the negative cable from the battery first , then remove and clean where the other end is bolted to the engine.
The same thing should be done with the positive cable BEFORE reinstalling the negative cable.
While in there , never hurts to check and clean all wires that connect to the sheet metal of the vehicle.

Electrical parts require certain amount of power to operate and if there is any resistance due to poor connections , the power can't get to where it is needed.
Sometimes a new fully charged battery will work for a while, but will eventually have the same problem where it's power cannot get to where it is needed.