Where is the 2008 ford fusion starter relay located?

The 2008 Ford Fusion does not have a starter relay; it instead shares fuse #10 in the passenger's compartment with the powertrain control module (PCM). The passenger's compartment fuse block can be found behind the kick panel under and slightly to the left of the steering wheel. In case You don't have a diagram, fuse #10 is a 30A fuse located on the third column from the right, third fuse from the top. In case You're instead looking for the '08 Fusion's starter solenoid, don't: it's integrated directly with the starter motor. Replacing one necessitates replacing the other, as there's no way to break down the assembly. If You suspect this is the part that's gone bad, You'll need to dump $200 to $300 into a new starter, unfortunately.