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2005 Lincoln town car customer hooked battery up backwards…

2005 Lincoln town car customer...
2005 Lincoln town car customer hooked battery up backwards now power steering very hard to turn, could this have some sort of computer controlled valve or is this just a coincidence?
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Answered in 22 minutes by:
3/7/2018
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Ford
Satisfied Customers: 5,228
Experience: Owner at Carolina Auto Service & Sales , 20 years experience in Foreign & Domestic Vehicles
Verified

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

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Hey how are you ,I will Try to Help you with This Issue

Let me check what is involved, but on top my head no electronics involved but let see ?

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looks like we do VASP( Variable assist power steering on this one

check fuse F1 and F112 and F22 in the battery junction box, a 20 amp and a 30 amp fuse and 10 amp

this power steering is controlled by the air suspension module, he either blew one of those fuses or burned suspension module

click on link to view circuit diagram

s
Please Let Me Know
Thank You
Chad Farhat
ASE Certified Technician

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Principles of Operation

Variable Assist Power Steering (VAPS)
The variable assist power steering (VAPS) system controls the level of power assistance available to the driver based on vehicle speed. At less than 3.2 km/h (2 mph), full power steering assist is provided to decrease steering effort and increase maneuverability. Between 3.2 km/h (2 mph) and 191 km/h (119 mph), steering assist decreases gradually at a calibrated rate to raise steering efforts for increased directional stability and greater road feel. At greater than 191 km/h (119 mph), steering assist is constant.

The air suspension module outputs a pulse-width-modulated (PWM) current to the control valve actuator. The control valve actuator controls the hydraulic valve that determines the amount of hydraulic assist provided to the steering gear. The amount of assistance provided varies with the control valve actuator current, which is based on the vehicle speed.

The vehicle speed is provided to the air suspension module by the powertrain control module (PCM).

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Click on link to view pin point test on circuit and on variable solenoid

Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Ford
Satisfied Customers: 5,228
Experience: Owner at Carolina Auto Service & Sales , 20 years experience in Foreign & Domestic Vehicles
Verified
Chad Farhat and 87 other Ford Specialists are ready to help you
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Customer reply replied 1 month ago
Thanks again for the documents got it fixed. Talk to you next time.

ok sounds good ,thanks terry

Thank you for the Rating :)

http://www.justanswer.com/car/expert-chadfarhat/?rpt=3800

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Chad Farhat
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Ford
Satisfied Customers: 5,228
5,228 Satisfied Customers
Experience: Owner at Carolina Auto Service & Sales , 20 years experience in Foreign & Domestic Vehicles

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