Could be the security/immobiliser system. Could be the system has amnesia and forgotten the code...
The battery is probably badly sulphated and has cell problems
use a load tester to check the battery
after that use a scan tool to reset the ECM program as the CPU is corrupted
SOURCE: 1995 ford escort, alarm keeps going off and car wont start
The alarm brain should not be the easy to locate if stock. Put everything as it was. The alarm brain, control, module or whatever any one wants to call it is most likely behind and under the radio possibly on the floor but in that area. That is if it is OEM if not then it should have been installed under the instrument cluster. I should be a small box probably held with zip-ties and it should have all the information, manufacturer, model and wire functions on the brain. If you think he found the right thing then have him look for the red wire that connects to it. It should have a 15amp fuse on the cable. If its taken out this will disable the alarm. What ever he found should say Security, Alarm or something like that. Not door control or anything other.
SOURCE: My 2005 ford explorer check charging system warning light
if charging light is on w/ engine running,the fault could be the alternator or another component of the charging system.remove, clean and tighten battery post connections to check for alternator output,use a volt meter or multi-tester set to 50 Volts DC,w/ tester on battery terminals it should read 12 volts W/ engine off;13 to 14 volts w/engine running.if voltage increases when alternator is spinning,suspect battery
SOURCE: my 2000 ford explorer suddenly wont start... the
does the battery have a full charge to it? If so clean battery terminals and chck battery cable at starter make sure its getting good contact. Make sure battery ground is making good contact at engine. Can you jump the car off? If so take off positive battery terminal while the car is running if the car dies altenaters bad replace it.
Testimonial: "will submit my testimony after i try the advice, but i asked for help in getting my hood opened also, which i guess they forgot to answer. "
SOURCE: ford five hundred has flashing light on dash for
sounds like chip key is not communicating with host computer. Part of anti-theft. probably a good idea to see dealer.
SOURCE: My Ford five hundred won...t turn over
All indicates to a flat battery. If the lights work or the horn blows, that is no indication that the battery is still good. You need to use a hydrometer to test the electrolyte SG to check if the battery is at full charge.
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