first, replace that 10amp fuse with a 7.5 amp fuse. Next, and this is a big next, please take an amp meter or one of those screw drivers with a light in it and a ground cable. CHECK ALL YOUR FUSES and open wires for current, if you have that, then basically you're problem may be found through either a blown fuse somewhere. If not, don't worry asbout the relay, make sure the relay wiring is all solid and make sure there are no cuts or anything like that through the wire.
1) Check for current first,
2) replace all blown fuses (they're free at most junk yards)
3) if that isn't it, check the wiring from your relay.
Your headlamp switch sends wiring to a relay (if you have fogs equiped), if you check the FAQ on the website of turining your fogs on with your parking lights, you'll see a descripting of the wires and that relay.
If not, post again and we'll troubleshoot together
