Banacek

Hi fan harness connections with the fan shroud removed looking at the fan connectors the fan on the left drivers side the Brown with Black trace going to the + positive side on fan with Red with Blue trace going to the - negative connector . On the Right passenger side the Brown with Black trace going to the negative side Red with Yellow going to the positive side connector is the correct car has been messed about with and connectors are burnt out.

FredR

Sounds as though one of your fans would have been spinning the wrong way moving air the wrong way.

Mrmerlin

based on wire colors
the brown is negative,
the red is positive