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.

Disconnect the fuel pump (and PCM) to see if that corrects the problem.

Next, starting from the fuel pump connection, follow the wire harness back and look for frayed/chaffed insulation. Pay close attention to places where the the harness goes near a sharp edge.

As the 30 amp fuse blows when you put it in drive, pay very close attention to the wire harness around the engine/transmission.

Also, you may have a wire harness problem within the steering column.

ok, thanks. btw, is there any way to wire the pump directly or does it have to be in its circuit to work properly?

In past times I have installed an IN LINE lectric fuel pump in vehicles that sat for weeks or months without being started. These vehicles all had carburators and needed to turn over and over to get the pressure up and fill the carb before they would start.. It worked fine for what was needed.
However in a modern injected vehicle with a pump in the tank... and a rollover device in line... I wouldn't wire away from the factory install.
So find the break in the wireing and repair it, that would be best for any and all concerned.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

found it. turned out that when i had my o2 sensors replaced the mech was kind enough to run the lines to the rear one on top of the drive line. a little liquid tape and alot of electrical tape fixed her right up.

Cool. Glad to hear of the success...