the fan relay in in the ircm, intigrated relay control mod, has, ecc,fuel pump,a/c and cooling fan relays in 1 box ,its at the passenger side strutt tower, black box with lots of wires going to it, i think the # like f1zz-12b577-aa, big G 
__________________ 93 LX, 5.0, aod 3.73,bbk shortie headers, x pipe, pypes 2 1/2" all mandrell bent , carbon fiber driveshaft,70mm throttle body,73mm c&l meter, 24lb hr injectors,b303 cam, crane cobra 1.7 r rockers, electric fan, 6g alt,underdrive pullies,00 gt wheels 17x8 1/4 mile time 12.85. @ 108.96 mph .100% italian | 
1991 mustang cooling fan relay 
