I got the fuse panel out, but now I'm no less confused.
There is a circuit board in the top of the fuse box that the fuses plug into one side and then get routed around to the harness on the bottom. You can't tell which lead on the top goes to which on the bottom.
The wires closest to the relay in question lead out and directly away from the ECU, which is where the diagram shows the wire leading to.
The ECU pin layout I got is for an 06, and it does not match my 05. Anybody got the ECU pinout for an 05 Cobalt LT?
There are 2 things in front of the fuse panel that look like ECUs. One is square and has one connector. The other is rectangle and has 2. What are these? The one with 2 is the ECU, right?
I would think that this is 2 different problems, but the chances of both happening at the same time are pretty thin unless one caused the other.
Fuel pressure is intermittent, but it never starts.