Lights and everything works, but jeep won't crank.

inline Fusible link possibly. Will lights come on etc?

have the fault codes read as that will indicate the problem area

Crank sensor wont have any effect on starting, Cam position sensor would. Also check all your fuses.

Faulty starter solenoid

Test for fuel and spark while cranking and work from there.

Jiggle the wire connectors going in to the computer under the hood -- first check battery cables/terminal connections at battery -- beleive it or not, connection could SEEM good because you get crank & lights, but if it's faulty, loose, engine won't start - computer requires good solid voltage flow.. next check a fusible link very close to the battery off of the positive cable. check fusible link carefully. this could cause your problem for sure.

Could be the crank sensor is bad but If the check engine light does NOT come on when cranking at the times when it won't start, then your ECU is in need of repair. The engine will only start after the check engine light comes on and the ecu is what controls that. It's likely going bad, causing the delayed start problem typical of early 90's jeeps. Repair or replacement services for your jeep ECU are available on ebay.

I have a 1995 Jeep sport it crank but wont start I dont know what it could be

Not aware of any re-set on Jeeps. But you said it won't crank? Starter is not working? Please clarify.
If it won't crank over from the starter, your problem is in the start circuit, and not affected by fuel pump operation. So, please reply.

What all have you checked as initial steps? Have you checked the fuel filter as first and foremost step and also Is the check engine light ON?