Previous owner did some shade tree mechanic wring on my truck. For the life of me I cannot figure why/what he did. It appears to begin with the light blue/black wire in the picture. Does anyone know what that wire is for? I pulled the two inline fuses but found no quick answer. Clue may exist in driver side power window (Up is down & down is up).

All advice & suggestions welcome, TIA

 

This might help