On my wifes 99 chrysler LHS the steering turns very hard left and normal right have replaced the pump and still the same.

Its mostly issue for ratchet pinion.I suggest get it inspected.Also previous expert has suggested same fault.He is most probably right.
For your troubleshooting,there are few help links with solutions.I also suggest you to go with these links and follow the troubleshooting to take care of these issue:------Power Steering going out?

http://schematicsdiagram.blogspot.in/2012/04/power-steering-going-out.html

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How to Replace power steering pump on Chevy silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-pump-on.html

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How to replace Power steering rack and pinion gear on Chevy Silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-rack-and.html

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Power Recirculating Ball Steering Gear removal on Chevy silverado 2500 HD? http://technoanswers.blogspot.in/2012/02/power-recirculating-ball-steering-gear.html

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Chevy Silverado 2500 HD steering wheel replacing Procedure? http://technoanswers.blogspot.in/2012/02/chevy-silverado-2500-hd-steering-wheel.html

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Steering Wheel Locked?

http://schematicsdiagram.blogspot.com/2011/12/steering-wheel-locked.html

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How to Remove Power steering Pressure Hose on Dodge Stratus

http://schematicsdiagram.blogspot.com/2011/12/how-to-remove-power-steering-pressure.html

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How to replace power steering pump on Mitsubishi Diamante?

http://howtobyme.blogspot.com/2012/01/how-to-replace-power-steering-pump-on.html

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How to bleed power steering pump on Toyota?

http://repairhelpcenter.blogspot.in/2012/02/how-to-bleed-power-steering-pump-on.html

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---------- How to replace power steering pump on Toyota Land cruiser?

http://repairhelpcenter.blogspot.in/2012/02/how-to-replace-power-steering-pump-on.html

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Steering service light ON GMC Sierra Denali?

http://technoanswers.blogspot.in/2012/02/steering-service-light-on-gmc-sierra.html

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Steering service light came on 2004 Pontiac Grand Prix

http://technoanswers.blogspot.in/2012/02/on-one-my-pontiac-grand-prix-relatred.html

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Check power steering message on Toyota?

http://schematicsdiagram.blogspot.in/2012/02/check-power-steering-message-on-toyota.html

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How to remove power steering pulley on 2002 Ford Taurus? http://repairhelpcenter.blogspot.in/2012/03/how-to-remove-power-steering-pulley-on.html

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1992 Ford Aerostar Power steering and Alternator belt routing diagram?

http://carbeltrouting.blogspot.com/2011/12/1992-ford-aerostar-power-steering-and.html

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How to replace Power Steering Pump on Acura Car Models?

Also bleeding:

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

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How to replace Steering Linkage on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-linkage-on.html

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How to replace power steering pressure hose on mustang?

http://technoanswers.blogspot.in/2012/02/how-to-replace-power-steering-pressure.html

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STEERING SQUEAKS http://alltypesofpartsreplacing.blogspot.com/2012/10/steering-squeaks.html

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Steering Column Diagram For 1990 Jeep Wrangler http://schematicsdiagram.blogspot.in/2012/07/steering-column-diagram-for-1990-jeep.html

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How to replace Steering Wheel on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-steering-wheel-on-acura.html

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How to replace Power Steering Pump on 1999 Acura TL?

http://howtobyme.blogspot.com/2011/11/how-to-replace-power-steering-pump-on.html

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These details will help.

Thanks.

Racket pion stiring is out replace it