1991 Jeep Cherokee low volts for fuel circuit

The voltage stays the same going in and going out of the resistor. I cut into the wire leading out of the fuse box that leads to the resistor and out of there it read the same about 1.80 or close. I decided I'd check different circuit so I tested the map sensor It also had only bout 1.80 volts and that is a completely different circuit than the fuel. I pulled the new auto shutdown relay out and tried to replace it with another and I was back to nothing. So I put the relay I had pulled out back in and now dont have anything at all again going to the resistor. The wires leading into the fuse box has full 12.50 volts around there. And I lost my spark again.