Clearing an obd 1 check engine light

I have a 1994 F-150 that threw a check engine light for my evap canister. I replaced the part and adjacent vacuum hose but I can’t get the code to reset. My scanner does not have a code reset button and I’ve tried both disconnecting the negative battery terminal for a few hours and pulling the ECU fuse but neither have had any effect. Can someone tell me how to reset it please? Thank you