Car will not turn over with key.battery is good lights stay on when trying to start.could it be my starter?

Battery could be dead. (Like maybe an interior light was left on for a long time) Do any lights come on in the dashboard when you turn the ignition key to run or start? Any noises from the starter/solenoid? If not, first place to check is the battery. If you have a battery charger, put it across the battery and see if any lights come on when you turn the key. If you are a member of AAA, call them and they can come out with a new battery and test your battery to see if that is indeed the problem.

You car have security system.first locate the security light and make sure goes OFF after unlocking the car
turn the key and monitor the instrument cluster if all the light stay on
apply parking brake and whit left hand turn to starting position and with right sift from PARK to NEUTRAL
locate the starter and connect test light to small signal wire,other end to ground. let helper start the car. did the light go ON?(replace the starter)
the light stay OFF (electrical problem)
Inspect all the fuses,switch the starter relay with known good one,clean battery terminals,scan with advance scanner for malfunction code,and switch to live data Look for starting signal from computer
good luck

check alternator if its fried car will die if its good car runs with dead batteries

Probably your battery is dead,enough for the lights or your alternator is bad which is what keeps the battery charged. Or your car is out of petrol.

Try to start the car with the lights on...if the lights go dead when you turn the key then the battery has low voltage. Try jump starting the car.

if the lights stay bright and you hear click, the starter is bad. Try hitting the starter with a hammer a few times. If the car turns over, then get at starter. -

Lots of stuff !
#1 If you can ,try to start it in neutral.
#2 In park hold the key so start and have an assistant rap the
starter motor lightly with a bar or whatever(if that works the brushes
in the starter are going,starter time)
#3 turn on the headlights ,have your assistant watch,they should
be bright,then turn the key,if the lights stay bright,it's a fault of the
starter or key/ignition system. If the lights go dim or out it's just
a battery terminal connection.
A few things to try anyway,good luck.

Negative Battery cable could be corroded, causing the fuse to the starter to blow. Hope it helps

Does the car have a factory security system? it may have a starter kill on it.
also check for voltage at the starter solenoid while someone holds the key to start position, you could have a faulty ignition switch.
the engine light stays on when the key is on until engine starts.

It could if battery only has enough power for just the lights, what I would try first is turn the light on and try to start the van, if the lights go to dim or off, then the battery is no good, if they stay bright then more then likely it's going to be your starter, another way to test the starter is hit the starter with a hammer or some thing you can reach it while some one holds the key to start, if it starts or not replace it anyway bad starter.

first go to the basics charge the battery fully make sure leads are clean and tight with ignition off put car in gear handbrake off and rock car in gear to turn engine over (make sure you are not on a hill) so as to move starter.
check back of starter wire connection both large power wire and small spade terminal
check wiring on back of alternator plug and main wiring for alternator if all this is ok and it wont start if you have ignition lights but still doing the same then if it is manaual tow the car and try and start it if it is auto you can only replace bit by bit but try battery first from donor car as this is the easiest good luck