05-29-2020, 08:57 AM
my guess on this is that it controls the fans on the heaters that are heated by engine coolant that are under your bed and in the water bay.
my 90 had something similar.
tom
my 90 had something similar.
tom
2002 45'8" Newell Coach 608 Series 60 DDEC4/Allison World 6 Speed HD4000MH