My 2007 chevy cobalt will not start it is not getting any power to the starter or fuel pump but lights work and I can crank the motor by jumping the starter relay can you help?

SOURCE: Won't start or crank after wreck.

this is probably a safety. no explosion, shut down. check to make sure no wires were cut/damaged and look in the trunk for an emergency shut off. there might also be a shut down relay onboard. if there is it's under the hood in the relay box.

SOURCE: 1999 Continental will not start

Does anti-theft light come on for a sec then turn off when you turn on the key or does it flash with key on?
You said that CEL turns off while cranking,does it come back on if you continue to crank after about 8-10 seconds of cranking?
If it does not then your PCM is not seeing a signal from the crankshaft postion sensor.You can try wiggling the harness at the crankshaft postion sensor and see if it will start.

SOURCE: 1994 chevy p/u no start tbi problem no power to relay

try the fuel pump relay.

SOURCE: i was having problems with

I have worked on quite a few chevys and can tell you what I've found to work with this type of problem. When you replaced the starter, did you tug on the fusable links that connect to the solenoid to see if one of them was burned and loosing power? There are two or three short pieces of fusable link attached to wires that power the fuse block and other electrical circuits at the solenoid / battery cable connection that will stretch when you pull on them if they are bad. If they are, then you won't have power for the fuel pump, relays and other circuits to make the truck start.
If one is bad, cut the wire behind the link connection and put a **** splice and piece of wire on it with a ring terminal,and connect it to the solenoid. Turn on the ignition and listen for the fuel pump to buzz. The fuel pump is controled by the ECM and makes the pump turn on for 3 seconds to prime the system with fuel before starting the engine. One of the wires on the solenoid with a fusable link does this. If this works, your done.
If the truck won't crank when you try to start it, check the "S" terminal for power with a test light while someone turns the key. The "S" terminal on the solenoid comes from the ignition switch, to the neutral/backup / clutch switch to the starter. You'll have to check every point in between these for power to locate the problem. One bad connection or part will keep the starter from getting power to the "S" terminal. You can use a screw driver to test if the starter is working by touching the two terminals together.
While your under the truck, look at all the wires in the harness for any chafing or rubing, I once found a wire that rubbed through and was causing the problem.
Hope this helps, Craig

SOURCE: 2007 chevy cobalt cranks. won't

Thanks for choosing FixYa and welcome to the site. Have you checked for fuel and spark? The car needs air, fuel and fire to start. Since it is cranking, it is either fuel or fire. We need to test them both.