2006 Ford Taurus that will not start. Battery is not dead

We have a 2006 Ford Taurus that will not start. Battery is not dead, radio and lights work. Had it in, they created new keys and replaced the starter relay 2 weeks ago. Now car won't start again, even when jumped. What else could it be?

Answer:

The Starter itself could be bad. The ignition Switch could be bad. The battery cables could be loose or corroded. If the car has a Fully charged battery and a correctly installed starter and you are getting one hard click and the dash lights/head lights do not go out when it clicks. Then the engine may be locked up and you will need to confirm it isn't by putting a socket on the end of the crank shaft and turning it. If there is a click , click , click (repeated clicks) then the battery is bad ( even if it is new) If you get a short click and the dash-lights/head lights go out when this happens, then your connections at the battery are loose/dirty/corroded or the battery cables are corroded internally or where the battery cables goto the ground and or starter are loose/dirty/corroded. These are the only options unless this is a ford then you may have a failed fender mounted solenoid. No Start Diagnostics