Blue light blinkinking on 2007 dodge caravan it won't start why?

ok....nuff jokin'....your Battery has to be newer than five or will not take a recharge anymore and not be powerful so 1. Get a new battery 2. the 1/0awg Black cable has a clamp end and the Lug end...coarse wirebrush this lug and the spot where the lug attaches to assure 300 cold cranking amp capability...and a renewed ground for all the smaller amperage requirements such as the fuel pump, ignition and dash lights....these items do not care too much about varying amperages and voltages....but the ECU and other delicates DO care and go unreliable and cast failures where there really aren't any....basically FAIL at their job of being the computer brain....your light is a plea for help...remove corrosion from the connection...reliable amperage is NOT available...Constant 12.5 volts is NOT available....NEW battery...a good one...Poppa is VP of Engineering at Interstate....they are good~

do you have a keyfob? security may have you locked out. Try to disarm by unlocking doors w/key.