1991 Chevy S-10 ECM fuse blowing when ignition is turned on

Hi,

A few days ago I was out driving and stopped at a business for a few minutes. I turned my S10 off while I was there. When I went to leave my S10 would not start. It would try to turn over but acted like it was not getting fuel.

Fast forward, we have changed the fuel filter, checked all of the wiring under the truck leading back to the fuel pump. We have dropped the fuel tank and pulled the fuel pump to check the connections. The fuel pump works fine if you connect jumpers to it directly. (Fuel pump was replaced approximately 2 1/2 years ago.)

After all of this it was discovered that the ECM fuse was blown. A new fuse was put it and it blew the moment the ignition was turned.

We can not find any pinched or worn spots on the wiring. Someone else has now suggested that it might be the computer brain.

Are we on the right path? I do not want to waste more time and money tracking the wrong components. Friends that are trying to help mean well but some would pull an engine to change the spark plugs if you know what I mean. :-) I do not have a lot of money and I need my truck.

Thank you for your help. Jackie