98 Problem - Electrical or Fuel ??

Hello again guys:

Posting issues here more than I'd like but thankful for all of your help.

Last night on a long trip home, the dash lights would all come on and speedo and tach would fall for a split second --- as if dying and then would be fine --- until a few miles later when I could feel the engine "almost" die ---- and a few miles after that it did die --- all with the idiot lights come on etc.

I coasted to a stop and it started right up --- and I proceeded to drive the remainder -- 100 miles -- without a glitch.

Is this the ECM ----- fuel pump ????

Hope I explained this well enough -- if not I can clarify

Thanks in advance

I cut my keyswitch off then back on one night in my Dodge truck...acted the same way except the motor didn't eventually die.
I'm kinda leaning toward a current interruption like a loose battery cable or bad keyswitch.