My 6x6 starts runs for approx 4 min then quits. turn key off then on fuel pump functions starts and runs 3-4 min quits.

When it does not start spray come starter fluid into the throttle body/carb to see if it will run. If so, it is a fuel problem. Also check electrical connections for looseness.
Possible contamination of the fuel with water.

Yes. Easy to check power at both sides of fuse or check for power at pump. If you have power then it's the pump.

The fuel pump should not run continually when the motor is not running. I am assuming you mean when you first turn the key on, not when the motor is running as you would not hear it at all over the engine noise. (and would not run)
When you turn the key on, the fuel pump should still have retained enough pressure to only require a quick blip or two from the pump. You may just not hear it possibly.
But if it is not functioning correctly, read on.
First, the fuel pump is non-serviceable. It also includes the fuel sender and pressure regulator.
It gets better.
The fuel pump is an integral part of the fuel tank meaning you must replace the entire tank to replace a faulty fuel pump.
You can perform a fuel pressure test if it powers up, if not perform a continuity test. There is also a voltage test to check. If all the tests check out ok, but there is still a problem, take your machine to an authorized Polaris dealership for ECU testing.

Hopefully it is not low compression and it is just a dirty fuel system or fouled plug. Make sure the batt is fully charged and spray some started fluid in the intake and see if it will start. If it runs rough clean the carb.

What light's up for 2-3 seconds then goes blank ? Instrument cluster ? 6X6 you mean a 4 wheel drive . This problem if instrument cluster , the instrument cluster is bad or SMJ - smart junction box First off a scan tool that will communicate with all the modules on the vehicle needs to be hooked up ! Instrument cluster has microprocessor inside an is on the vehicle communication data bus. If the instrument cluster is bad , needs replacing an programming . Dealer only .
NOTE: If installing a new instrument cluster, it is necessary to upload the instrument cluster configuration information to the diagnostic tool. For additional information, refer to Section 418-01 .
Principles of Operation
Some modules must be programmed as part of the repair procedure. If this procedure is not followed, the module does not function correctly and may set a number of diagnostic trouble codes (DTCs), including B2477 or P1639, which indicate that necessary data has not been programmed into the module.
Modules that need programming should not be exchanged between vehicles. In most cases the parameter values or settings are unique to that vehicle, and if not set correctly, cause concerns or faults.
The diagnostic tool automatically attempts to retrieve the module configuration information from all modules and from a backup location in the powertrain control module (PCM) when vehicle ID is carried out. If the module and the PCM do not contain correct information, the diagnostic tool either requests As-Built data or displays a list of items that are needed to manually configure. The diagnostic tool programs the module based on the data entered.
Your best bet is take your vehicle to the dealer or some other qualified repair shop .
Do you know what C.A.N is ? controller area network .
Your How to Diagnose Controller Area Network CAN

The most common causes of a water cooled engine overheating are (1) poor circulation of cooling fluid (bad water pump or stopped up radiator); or (2) inadequate air flow cooling (bad cooling fan); or (3) compression gases entering the cooling system (leaking head gasket or cracked block or head). The first check is to see if air is in the cooling fluid (small bubbles appearing in top of radiator or coolant reserve tank). If so, then #3 is the problem. The second check is to see if the cooling fan (s) is running properly (can feel air flow on output side?). If not check wiring and/or replace fan (#2). The last step is to drain the radiator and engine (turn over engine to allow water pump to empty the block). If additional cooling fluid does not drain out the radiator drain port, the water pump is defective. If the water pump does empty the block, then flush the system with a good flushing agent. Follow instructions on flushing agent bottle. Drain out the flushing agent and re-fill radiator and block with clear water. Run engine as per instructions on flush agent bottle. Drain system again and re-fill with antifreeze (50%) and water (50%). If vehicle is located in a very cold climate, then increase the antifreeze % up to 75% (25% water). Remember, not only does antifreeze help to keep water from freezing, but it also helps to increase cooling ability.

sounds like electric fuel pump when it quits,take fuel line off at carb turn key on you should hear pump and see fuel coming at line

you got a bad injector

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sounds like the Rev limiter is being engaged for some reason, had that happen on my Polaris express, the problem was moisture.