Car loses acceleration ability. Lights and brake lights come on without useing knobs to engage them

2005 MERCURY MARQUIS
125,000 MILES • 3.0L • V8 • 2WD • AUTOMATIC
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QUARRYMASTER
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The car will start properly but not maintain power when the transmission is engaged. The third brake light, turn signals and headlights will be on without applying the brake, turning the headlights on or using the turn signal.
Jun 8, 2014 at 9:27 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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