Squeels at start for first two seconds

are you reading the meter right ?, less that 1 volt?
did you crank the engine and read,many car dont start the pump unit cranked.
it must be 12v or 11v if very cold and bettery volts sag a bit (1v) cranking. that is how you do this.
on some jeeps (i dont do liberty) the ASD works like this.
the 2 second rule.
TAKES 2 people to test a JEEP.
not 1.
one to crank and one to measure.
the PCM allows 2 seconds. of full spark and injections
if it sees errors,. it kills every thing, spark and fuel.
its jeep.

Immobiliser fault, disconnect battery from poss terminal for 15 seconds, reconnect battery close hood and doors lock car with fob wait 20 seconds open car and start car.

Time for a code check.

the pump dies when the engine stalls or runs too slow.
so, the steering has nothing to do with that , unless the
pump seized, so drop the belt and start car.
if car will not start, that is a no start question
post it as, cranks fast but will not start. and what engine option
some have diesel.

have the light checked see what the code is and then repair that circuit

Check the belts are still tight enough, sometimes they slacken off with use and then start to squeal, especially in cold/damp weather.

did you change the spark plug and wire?

That may fix it


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we call it the fan belt,it is loose enough to cause it to slip(squeel)whenn cold it just needs adjusting.(the 1/2 inch wide belt that drives the alternator).

Check the temperature sensor feeding the ECU and O2 sensor.

You need to check your electric fan under the radiator cowl. That pull the heat away from the ac radiator. Liberty's have two fans. One Mechanical and one electric.