Battery on ford Eco sport keeps going flat only light on is pats alarm flashing could this be a drain

Four door, explorer sport two door? Theft light flashes?1998 model? Do you know what (PATS) is? fords anti-theft system. Most ford vehicle the Pats system disables the starter electrical - keeping the starter from working. Not in the case of your vehicle, does not disable the starter , probably cuts power to the fuel injectors killing the engine that way. Need to have vehicle scanned for codes.

chech and test fuse relay and connections === test battery [load test ] ---test starter and solenoid

The passive anti-theft system (PATS) is installed on every Ford Expedition at the factory. While some erroneously call this system the factory alarm, it really is not an alarm system. The PATS system will arm itself if someone attempts to start the vehicle with anything other than the PATS key programmed to that specific vehicle. Once the system is triggered, the red light on the dash will begin flashing faster than normal and it will remain in this mode until either the proper key is inserted and turned in the ignition or 15 minutes has passed.

Check to see if any of the lights in glovebox, underhood, or trunk/hatchback are staying on. Also may have some aftermarket devise that is not powering down when you turn off the key ie (stereo/ amp or alarm system) you may have partial alarm system? Check that panel lights also go off with the light switch they are sometimes hard to see in daylight and not at all once the battery dies! Hope this helps.

you must disconnect the battery for 5 minutes then when you reconnect the cables press the alarm deactivate button on your remote I believe your car will start and when you see the pats light rapidly flashing the cars in theft mode and will not start

Sounds like an after market alarm. If so, take it out or replace it. When I get cars like yours or won't start. If I see an aftermarket system, I tell customers that I won't work on them till this is out of the cars system. 99% of the time, The car works.

Starter and alternator are the most likely culprits(one day). Interior lights and radio will also cause this. But usually takes a couple days to drain the battery.

pats is the system that is controlled by your key the pats transponder and the pcm,it is a security system the system is relitivly easy to fix I ask you to please log on to you tube and check out ford focus no start it will explain the easy fix you have to do.I could try to explain it to you but it would be easier for you to watch the video and it will fully explain it to you

disconnect the battery for 1 minute and try again - ---quick fix possible with that---
if that makes no difference then I would like to know exactly what model of alarm and immobiliser the car has - what is the maker + model no/serialno of the keyfob for the alarm, I can get the info I need off that.
also you can check the fuse in the alarm if you know where the alarm is situated, it will have a fuse either on an inline fulseholder on as a spade fuse stuck into its casing somewhere - replace the fuse if blown and try again to start the car ------------ tell me the model no of your alarm and immobiliser if no joy after battery/fuses and I can read up on them and see if I can fix your problem...