I have a 2000 subaru legacy on which the battery was was connected wrong, something got fried i think, not sure what. I can't get the ignition light on.

the relay should not have any power to it. i would think there is a sort some were on the ignition. i would check the ignition wiring and make sure its not damaged or assembled wrong. relay should only get power when the key is in ignition and turned to start engine.

I think maybe your security has locked you out, look in your manual for security relearn instructions.
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Try turning on the headlamps when it fails and see if they dim when you attempt to start it. If not, probably bad starter solenoid.

New from the junkyard or new from the autoparts store? Solution 1 or 2.

Could be a poor connection on one of the battery terminals - be sure they are tight.
Could also be a starter solenoid that is sticking.

cycle ignition on/off 3 to 5 times

Have the charging system checked it sounds like an alternator problem

The thermostat is mounted low down on the bottom of the engine where the large radiator hose connects to the radiator. The housing is bolted to the engine block and the thermostat is inside. Don't attempt to replace it unless the engine is cold otherwise you will burn your hands. Make sure you bleed all of the air out of the system before driving off.

Absolutely! This could Definately Fry the Computer System!

Subaru Outback Legacy Flashing
Q. I have a 1996 Subaru Outback Legacy AWD manual transmission. the hazards flash when I turn the car off. I tried to reset the system by pushing the little black button under the drivers' side dash but it won't reset the system. I had problems with the brakes so I did not drive it for about two months and when I tried to start the car the battery was dead.
Now the brakes are fixed but the hazards won't quit flashing and the guy who repaired the car said I needed to reset the system by pushing the little black button. And I don't know if I should have it looked at, or change the battery, or if it is something very simple I can fix by my self.
Thank you very much,
Patrick
A. Patrick, you are the third person in the last two days that has come to me with this same exact problem under the same conditions. As of now I don't have any concrete information on this, but I believe the problem to be in the alarm system.
I believe the battery being disconnected or dying does something to the Anti-theft and Alarm System module and having a Subaru dealer reset the system will correct it.
If you do this and it works, please, let me know and I will pass the information on to the others.
Added 11/7/2003
Dear Mr. Ciulla,
I read your Q&A titled "Subaru Outback Legacy Flashing". I recently had the same problem on my 1996 2.5 liter Subaru Legacy Outback and your response is correct but I can give you a little more detail on what worked for me to stop the light flashing (which occurs sometimes if the battery had been dead):
There is a black reset button under the I/P near the anti-theft module.

1. Turn ignition on
2. Hold button 20+ seconds (door locks will lock/unlock 3 times)
3. Turn ignition off

This also resets the key FOB so as step 2.5 you should also press the "lock" button on the key FOB before releasing the black reset button (door locks will lock/unlock one more time--do this with each key FOB you own). That's all!
The questioner in your Q&A said he tried the reset button; I suspect he either didn't turn the ignition on/off or didn't hold it in for over 20 seconds.
PS... pulling the door lock fuse will stop it temporarily if you can't get the above to work and have to take it to the dealer
Regards,
John

Photo Courtesy John Spieth ©2003
Additional Information provided courtesy of ALLDATA