Our 2005 Ford Explorer Sports Trax's battery went dead after the lights being left on. We jumped the battery, but now the anti-theft light is on and will now allow us to start the truck. This happened to us last year and after we paid to have it towed in, it began working without explanation. Our remote is dead and it won't allow our keys to start it. What can we do to get the anti-theft to go off?

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

Sensor most likely on air bag light...could/did u blow a fuse for radio?!

Does this vehicle start? I had this happen in a 2001 Ford Freestyle. The battery was defective / deader than dead. AAA came out to jump it but nothing worked except the anti theft light that flashed, double speed if you turned it to crank, (Which it wouldn't) I had it towed to Walmart to replace the nearly new battery but it still wouldn't start. I called AAA back to tow it to the Ford dealer where I had to pay $65.00 to get the anti theft key/s and computer reset. I said "key/s" because they didn't tell me that I needed my wife's key because you can't just program ONE key. So either I pay a taxi for a 24 mile round trip or I pay an extra $20.00 for a new anti theft key. After that. I had 3 keys to that van. To make a long story short, Have BOTH keys with you when you take it to be reprogrammed.

Take the negative cable off of the battery, charge/replace battery, put negative cable back on, crank engine and turn off. System should be reset.

When my anti theft went off because I changed a battery, mind you it was an oldsmobile I had to take it to a dealership so that they could reprogram the theft system

Its a good possibility that the Anti-theft is interferring with the circuit. If you have an extra ignition key, use that in case the password chip in your regular FOB has detriorated.

There is a brake sensor which is on the upper brake pedal. It interlocks with the starter to prevent starting without having your foot on the brake pedal. Check your brake lights for operation. If the brake lights stay dark with your foot on the pedal, the switch is broke or knocked out of position. A common problem.

Next, there are small wires for the starter solenoid. You can use a test light on one removed wire and ground the test light to the vehicle, the other end in the small wire. Turn the keyswitch to start, with brake pedal pressed and see if it lights up. If it does light up, the starter solenoid may be bad.

Battery level. Ford Anti-theft and some say Battery-saver, can cause both starting and charging problems. A fully charged battery can be at 13.2V- 13.6V. When Ford systems detect low voltage it can activate the Anti-theft, battery-saver, and even disconnect the charging system to allow the battery to completely drain. In some cases the Anti-theft drops starter voltage to around 7V so the starter will not spin. Have the battery tested.

I know of 2004 trucks that were jump started and showed charging, then after 5-10 minutes they lost the charging system. Some people lost the charging system at 70MPH and drove until they stalled. All because of the automatic features built into the trucks. A new battery fixed the problem. Your problem could stem from this.

try closing and locking all the doors then unlock the drivers door with the key

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

you must have connected the battery opposite while jump starting and then reversed the polarity the correct way! now please have your immobiliser system checked and changed! and the number three junction block( with the door lock intergrated module)

take the positive side of the battery off for about 3 seconds and then put it back on to see if this will reset the security code