I fried something...

I disconnected the fusible link from it's middle connecting part and the entire car went dead. When I plugged it in everything works (that I can tell so far) except the radio. The radio lights up but that's all it does.

I tried pulling it out of it's housing thing in the firewall but it doesn't wanna budge, and I don't wanna break anything else. Will the firewall end come unplugged at all or does it have to be cut? It looks slightly burned near the firewall but not melted.