Power loss at Daewoo Espero

Hello guys.. For about 2 weeks I have had electricity problems with my Daewoo Espero 2.0 built in 1996. In the beginning I thought that the battery was gone by the cold, and so I bought a new battery. The problems remained and are presented as follows: – Vehicle starts at the stand, when getting there all show in the cellar, vehicle goes off. – Tank indicator, rev indicator go into the basement – Thanks to my starting aid station I get the vehicle back on, and After a short drive, everything is back in the basement. For me, it’s a mystery. As if the vehicle doesn’t get fuel. Does that mean the petrol pump doesn’t get any juice for me?? Is that right that more electricity is needed when starting up, like when the car is standing in the stand. So the pump pulls more power. And the battery can’t deliver alone, because the Lima is broken?? Because the battery is new, and after this whole theater where the vehicle doesn’t even start without help. No. After I have searched the Internet through that there is a Lima controller (with carbon brushes??) Now I stand there and don’t know how to act.. Ask for your help advice and support.. The Lima costs me approx. 80€ and the controller part about 20€ that still works.. I will also be able to be in the case : to exchange the Lima itself, or to exchange the controller part itself. Since only normal usual tool is at hand. Merry Christmas to all of you and thank you in advance for your help…