Security Lights - won't start

Subaru Legacy gt 2006 - car has been sitting for a few months. I go to start the car but its dead. I try to jump the battery but its powering on the electronics but when I try to crank it, it won't crank - won't even give the sound. The security light flashes.

Things ive read that may be the culprit are:

-immobilizer

-some fuse

-clutch safety switch (which I actually have the clutch mod to delete this so I dont have to press the clutch when starting it)

Thoughts?

FYI: Car is in Seattle at a friends house and I am in MA and im trying to ship it back home but it won't start and car shipping place wants to charge more to put on a flatbed.

Don't try to jump it. Take the battery out and put it on a Battery Charger on Trickle Charge aka slow charge mode.

Or buy a new battery (make sure it has a full charge on it.) have them test it before for charge status before you take it out the door many of the batteries that Auto Zone, O'Reilly have not a full charge because of transport/storage times.

Don't try to jump it. Take the battery out and put it on a Battery Charger on Trickle Charge aka slow charge mode.

 

Or buy a new battery (make sure it has a full charge on it.) have them test it before for charge status before you take it out the door many of the batteries that Auto Zone, O'Reilly have not a full charge because of transport/storage times.

Interesting idea. Why would that work?

A full 100% battery gives better power to the car. Jumping from one car to another is not as strong.

Also, you said it's been sitting for a few months. Gasoline can go stale over time. it also can get moisture in it.

You have the key fob, make sure the alarm etc is turned off.

I'm also thinking its a battery or at least clean the terminals on the battery.

http://people.csail.mit.edu/ilh/vacation/

there's the service manual if you need it.