Inside lit cycles on and off when car is in the garage overnite and drains the battery, does not do it in the daylit, ford says i need a new keyless entry pad, what can i do that is cheaper.

Videos and advice here. Looks like you will have to get it from a junk yard and the advice is to get a later model with the individually lit buttons.

https://www.google.com/search?q=replace+the+keyless+entry+keypad+on+a+2002+Ford+Explorer+Sport+Trac

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What ? the monitors aren't set ? Need to do drive cycle to get them to set . Do you have a check engine light lit ?

Ford Motor Company Driving Cycle

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1st point check the battery.

The light stays on? then that is the drain, check and see if you pull fuse that controls that light will battery still drain. i would bet that this is the problem, if it is the problem let me know in a few days and i will check a wiring diagram to try and see what controls that light. i believe the keyless entry module does but lets see if that is the problem.

try removing the dashlight fuse over night or even light few, until that light goes out and let me know.

Is the alt charging the battery does it run long dist fine ? If it does you have a drain some where something is corroded inside a eletrical connection cause a drain on battery over night .You need a amp meter disconnect the poss battery cable and connect the meter inline one temp to battery term the other to cable end . reading should be less then 500 millaamp or half a amp it may be 7 or 800 at first but car needs time to go into sleep mode then should drop to 500 if not start to remove fuse until it does then youll know what circuits to check.most of time its a light bulb

try charging battery well then disconnecting the alternator try that and see if it still goes flat .

you may have something draining the battery a bare wire touching something, check all of the lights , trunk,hood, glove box to make sure they are all off try disconnecting a lead from the battery overnight to see if the battery still is dead in the morning, if it doesn't go dead you will have to try and find out where the problem is .....hope this helps......cheers.

make sure that your battery cable connection are good and clean at both ends, make sure their tight, check to make sure you havnt left an interior light on, or park lights.
it could be a short somewhere, hope not
hope this helps, good luck

If u have the system here is how you program it this is from the owners guide.
1.. Turn ignition to RUN or ACC.
2. Momentarily jump pins in programming connector located in LR quarter panel area (Connector will not be plugged
into anything, it will have two pins inside it, if you have to unlug it you have the WRONG one. Not all vehicles
are set up from factory for keyless remotes) All doors will lock then unlock to confirm programming mode.
3. Press any button on first keyless remote. Door locks will cycle to confirm programming.
4. If programming a second keyless remote, press any button on second keyless remote.
Door locks will cycle to confirm programming.
5. Turn ignition to OFF. Locks will again cycle to indicate end of programming mode