i have an 83 eldo, the displays are out. i just buy this car. someone put in a pos radio. wires cut taped. i took it out. nothing there now. i got another ecm. put it in,when i turn the key on the displays lit for a second and went out. what can i do? the fuel i can live with out, but now it is getting cold here i need heat. any way to over ride it and get heat? or what can i do to make this work. i feel the clown who put in that radio messed things up.any help plz,thanks