The wire that goes from my ecm b fuse to the fire wall fried its self the other day and I'm at a loss as to what could of made this happen. I know it burned up because there's a short somewhere and the idiot that owned this k5 before me wrapped tinfoil around the fuse ends and the short couldn't pop the fuse anymore so it melted the wire. I guess what I'm asking is has anyone else ever had this happen and what they did to fix this issue so it didn't continue to pop the fuse

 

Vehicle info? From your screen name, I'm guessing you have a '90.

Have a read through this thread, it may help:
Oil sending unit/ecmb fuse shorting out

 

Its a 1990 k5 with the 350 tbi. If I get power to the fuel pump when I put 12v to the bypass wire I know that means my fuel pumps ground wire is fine. So if that's the situation what other ground wire could cause this? I know its a ground wire because the previous owner told me that a faulty ground was the issue but he didn't know which ground.

 

Did you read the link I provided above?

 

Yea I read the link. I went to me shop teachers from back in h.s. today and figured it out. Its either a bad fuel pump relay or a pinched fuel pump relay wire coming from the ignition (green and white wire?)

 

One other thing. If my fuel pump relay is bad then shouldn't my oil pressure switch still allow my fuel pump to work after a few cranks?

 

The oil pressure switch supplies voltage to the fuel pump relay after the engine has started. The ECU only supplies voltage for start-up. Voltage to the pump relay is maintained by the oil pressure switch after start-up. Ultimately, the fuel pump relay is responsible for the pump receiving power unless you are supplying power through the fuel pump prime connector which uses the normally closed side of the relay. If that does not work, then the relay could be internally shorted out.