keep blowing the relay fuse for the fuel pump on my 98gcl. calls for a 20a which blows right when it starts. if i use a 30a fuse, it starts but blows the fuse as soon as i put it in drive and try to go. fuses get blown on my new pcm as well as my spare. i know it has to be a harness short, but an electrician i aint. has this happened to anybody else here? where should i start looking? what am i looking for? this seems to be a common problem with this era gc so i would think that the short location would be common as well. thanks in advance.

98' BBJ Grand Laredo 5.2 locked and loaded,.01' Gen III XLS. Frankenmonty lives on in another.