My personal suggestion would be to go for t hese repair catalogs from www.reliable-store.com instead. much better language, complete manual of 800+ pages, and they also have live assistance feature
SOURCE: 2000 grand marquis cruise control not working
Have seen this problem before. You need to look under dash at brake pedal and find a blue switch with plunger contacting pedal, disconnect connector and jump with a peice of wire and drive to see if cruise works and if it does replace deactivation switch this should get you going.
SOURCE: how to replace starter +1993 Mercury Grand Marquis
disconnect battery,,jack car up,,put jack stand on frame,,take starter bolts out,(may not be easy),,take wires off starter,,hoped it helped,,
SOURCE: Where is the headlight control module on 2005
your lcm is located under the steering wheel to your right its that rectangle box with a connector showing.
SOURCE: where is the lighting control module on a 2005
it is located under steering wheel to your right
SOURCE: how do I change out the Headlight/ Lighting
u can do it your self the lcm is a stand alone unit just unscrew dissconnect and reconnect and screw
CAUTION: Prior to removal of module, it is necessary to upload module configuration information to New Generation STAR (NGS) Tester. This information needs to be downloaded into the new module once installed. For additional information; refer to Section 418-01 . CAUTION: Electronic modules are sensitive to electrical charges. If exposed to these charges, damage may result. 
CAUTION: Prior to removal of module, it is necessary to upload module configuration information to a scan tool. This information needs to be downloaded into the new module once installed. For additional information; refer to Section 418-01 . (I replaced one without doing any programming, so I don't think this applies). CAUTION: Electronic modules are sensitive to electrical charges. If exposed to these charges, damage may result. 
As you can see the LIGHTING CONTROL MODULE is located behind the instrument panel in the center this is very likely your problem as is controls all the lighting in the vehicle.609 views
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