awhile ago my battery died on me and i had someone give me a jump but ever since my keyless entry want work?

Question

my car is a 99 mustang , also the other car was a large truck and he kept the cars hooked up trying to get my battery to charge could he have caused a power surge and could it have damage my car .

Answer 1

You probably just need to re-program the remotes.
To do this, well I'll just paste the directions from your owners manual: (page 59)
****************COPY************
To reprogram the transmitters, place the key in the
ignition and turn from OFF to ON eight times in
rapid succession (within 10 seconds) ending in ON.
After doors lock/unlock, press any control on all
transmitters (up to four). With each control press of
the transmitters, the door should cycle (lock/unlock)
to confirm programming. When completed, turn the
ignition to OFF. The door locks should cycle (lock/
unlock) one last time to confirm completion of
programming.
All transmitters must be programmed at the same
time.
****************END COPY*********

If you want your complete owners manual, you can click here & download it (free, courtesy of Fords website). It is in pdf format & easily saved to your computer for future reference>

http://www.motorcraftservice.com/pubs/content/~WOXMUS/~MUS~LEN/42/99musog1e.pdf

Answer 2

Sorry Irv, but jump starting a car is a great way to damage electronic components. Happens all the time. Once you get the dead car started, you get a huge surge from the alternator kicking into high gear. Then you get another surge when you disconnect the cables.

I've seen jump starts burn out alternators that can cost $400. These days it's always a better idea to pay for a tow and get the battery charged.

You wouldn't just yank the power cord out of your computer, don't do the same thing to a car.

Rick

I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology. Visit my blog for cool articles and TSB's: http://free-auto-repair-advice.blogspot.com

Answer 3

Looks like your stuck with what you got now whether the jump caused the failure or not. Your afraid to go to a Ford dealer thinking it will cost a lot to fix it, but that's the best way to get an accurate diagnosis and estimate of repair or reprogramming costs because they know how security works on their vehicles and have the Ford shop equipment to repair it. Also check Ford's Technical Service Bulletins to see if any refer to the keyless entry and problems with it. Your car's almost 9 years old, so you may coincidentally have needed a new remote fob battery. Try another remote if you have one or try replacing the battery in the remote fob. Look's like Ethol's answer below me should probably fix the problem for you if the fob still works ok and can be reprogrammed.

http://www.edmunds.com/maintenance/MaintenanceServlet

Answer 4

I assume you have keyless entry and push button start (Nissan Intelligent Key). If the battery in the key is dead, you can use the key inside the fob to open the door. You cannot start the car because there is no ignition key slot. As stated previously, the dash light flashes when your battery is low to alert you to change the battery. My Mazda has a backup key slot in both the door and ignition, so a dead battery is not a big deal. I was a little worried too. But it's really convenient and lots of other things can fail in your car besides the key.

Answer 5

It is possible it did damage to the computers motherboard and if so it can be very expensive. One thing to know about jump starting a vehicle is to connect the negative terminal to a ground so the circuit does not overload from the power source(vehicle used to do the jump). Always refer to the manufactures/owners manual for proper procedures when jump starting your vehicle using another vehicle and jumper cables. Contact your dealer for the code to reset your key less entry(providing you did not damage the computers program) you can reset your code. May I suggest that you invest in a battery jumper box that you can carry in the trunk of your car for future incidence. They are designed to jump start most vehicles today safely without causing extensive damage to your vehicles computer system.

Answer 6

Probably just lost it's memory when the battery died. Go to
www.programyourremote.com
and look up the instructions for reprogramming the system>

Answer 7

12 volts is 12 volts.
Ampere flow is a matter of the resistance
of the circuit.
Unless he connected incorrectly, there's
little chance of damage.