What is error code 400 for chrysler crossfire

Question edited for clarity.
Question moved from Computers to model category.

You soldered what 3 pins? If you are trying to bypass something, you are trying to fool two computers and it can't be done.

When you disconnect the battery, you have to reprogram the alarm and anti theft immobilizer.

https://www.google.com/search?q=2004+Chrysler+Crossfire+no+crank+no+start

and stuck in Park

https://www.google.com/search?q=chrysler+crossfire+stuck+in+park

..

You won't get ANY HELP anywhere in the world

Most vehicles that go under water a scrapped

Your correct & if you think about it,how long would it take a
repair shop to get it going & at what cost to you,not worth
their while.

You now have a hobby to work on

You need to go to Helm.Com & spend whatever the cost of
a factory wiring diagram book is

You will need basic electrical knowledge & testing skills & will
be there a few weeks, I would guess.

You will also need professional scan tool software or you can't
work on any vehicle after 1981

Try using a code reader to reset the CPU and have him reprogram the key correctly as well. Personally I would not buy a car from this person until he had everything fixed properly.

Some models had a recall on ignition switchs, which could cause this kind of problem. This where I would look first,

When you disconnect your battery and then reconnect it again, it disables the radio. This is an anti-theft protection for your car radio.
The enable your radio the activation code is in your vehicle owner's manual. If you do not have this code you need to go to your Chrysler service centre and get them to enter this code for you.

Put key ignition press unlock or lock 2 times then turn key to accessory position within 30 seconds. Your FOB should work properly.

seems impossible to me unless it has a hot wire connected directly to the batter. You could put a toggle switch on it and it should not drain the battery

new cars have a lot of things running in the back ground, you can hook and AMP meter on the battery and see how much it pulls just sitting there, then one by one unplug fuses and see if maybe a relay has welded its self closed and drawing more current then it should in the off postion. if possible hook a battery tender to your car and plug it in, it will keep a small amount of current going to the battery and should keep the battery charged.

This is not the problem I have a chrysler crossfire and experienced the same problem there is some good news if it frequently stops working for no reason the problem is most likely the RCM module has a shortage in it I fixed my crossfire and 3 others buy repairing the RCM its easy and simple any question you can email me I can give you a easy walk through to fix the problem and avoid paying hundred at the dealership it shouldn't take no more than 15 minutes to fix DIY!!

If you have had the battery checked, attempted to jump start or know for a fact that the battery is new and/or should not be dead....you may want to have your alternator checked out - it may need replaced. When alternators go bad they mimic the effects of a dead battery (tries to turn over, battery light comes on, etc.) Hope that helps - you can pick one up and install yourself for around $150 bucks or 400-500 to have someone else do it for you.