![I have a 1990 chevy 1500 5.7 tbi. My fuel pump wont run at all. I removed and auxillary harness yesterday and since then I have a 1990 chevy 1500 5.7 tbi. My fuel pump wont run at all. I removed and auxillary harness yesterday and since then](https://ww2.justanswer.com/uploads/amedee/2009-10-22_152650_1.gif)
I have a 1990 chevy 1500 5.7 tbi. My fuel pump wont run at all. I removed and auxillary harness yesterday and since then
FIXED!! High-pressure fuel pump circuit won't activate on it's own - installed manual high-pressure circuit switch | IH8MUD Forum
![45 Luxury Electric Fuel Pump Relay Wiring Diagram | Electrical circuit diagram, Basic electrical wiring, Electricity 45 Luxury Electric Fuel Pump Relay Wiring Diagram | Electrical circuit diagram, Basic electrical wiring, Electricity](https://i.pinimg.com/736x/2d/2f/f5/2d2ff5ca58281051c29f6efa87a6fceb.jpg)