An Electrical Problem 1990 LX
 

An Electrical Problem with a 1990 Mustang LX, 4 Cylinder.
The Engine Fan, Temperature gauge, Power Trunk, Power (and Manuel) Door Locks All do not work, The Power Windows do however work. All the fuses appear to be ok. I was told, that the dashboard gauge (Temperature) works, and the fan works, but the problem is somewhere between the two, and couldnt locate the problem. Anyone with any ideas?? Please Help!!