Here are some scenarios I copied and pasted from another site that might apply here.

Reboot



Thanks Ragand! I experienced many of the same problem as others here ... car was fine but then key wouldn’t work (except manually), dash lights on but car wouldn’t start. Had the battery checked, it was good. Ran to the store and bought new batteries for key, that didn’t work. The button for the tow lock kept flashing and couldn’t be turned off. Took your advice and removed the battery cables, then touched the cables together for 15 seconds with the assist of a wrench. Reattached battery cables, Turned the ignition and wahoo! All was working as before



the car guy and he told me to take both battery clamps off the battery and ground both the cables to each other for 10 seconds this would reboot the car computer. Reinstall cables and this fix the problem



Put a new battery in it yesterday, it started fine, ran okay. However today, same problem as you described, electronic door locks don't work, lights flash when I open the door, Car won't start but all the electrical systems work. I took your advice, disconnected the battery, ground the cables together, and now it started, at least for now



Ragand's answer saved my life! Locked my '08 roadster (with only 13,000 miles on it!) and went to work. At quitting time the key fob wouldn't work. Replaced the batteries and still no go. Tried the other fob and no go. Opening the driver door only set off the alarm. The car powered up but wouldn't crank. I disconnected the battery and connected the negative and positive cables together for 10 seconds. The cables won't reach so I used a crescent wrench as a jumper. Reconnected everything, prayed, held my breath, and the doors unlocked!!! I put a 10mm wrench and a heavy guage wire jumper in the glove box to ward off the evil spirits! Thanks ragand!

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Ragand - tell your son he is a genius. I found several different suggestions on several message boards on how to reset my Crossfire Security system after it refused to recognize my key fob or allow me to start the car. The last idea I tried was to disconnect the battery and short the cables (I used my jumper cables). Once I connected the battery up again it was all fixed ..!!! Thanks SO MUCH !



I have a 2005 crossfire that wouldn't start. After reading these comments, I tried to connect the cables together with a pliers and it didn't work. Than I stretched the cables to actually touch each other and it started. I am amazed. Not to mention saving lots of $$$.



Thanks Ragand! I experienced many of the same problem as others here ... car was fine but then key wouldn’t work (except manually), dash lights on but car wouldn’t start. Had the battery checked, it was good. Ran to the store and bought new batteries for key, that didn’t work. The button for the tow lock kept flashing and couldn’t be turned off. Took your advice and removed the battery cables, then touched the cables together for 15 seconds with the assist of a wrench. Reattached battery cables, Turned the ignition and wahoo! All was working as before.

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