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Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Mercury Grand Marquis car and truck repair procedures including Mercury engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your 1991 Mercury Grand Marquis automobile. Try the Automotix DIY solution today!
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WIRING DIAGRAMS FOR 1991 Mercury Grand Marquis AUTOMOBILES

OEM drawn wiring diagrams for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S.

1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

Components on diagram:
  • Left Headlamp
  • Right Cornering Lamp
  • Left Hi Beam Headlamp
  • Right Hi Beam Headlamp
  • Left Cornering Lamp
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Vent Solenoid
  • Compressor Relay
  • Height Sensor
  • Compressor
  • Compressor Vent Solenoid
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Backup Neutral Safety Switch
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Glove Box Lamp
  • Main Light Switch
  • Illuminated Entry Timer
  • Engine Compartment Lamp
  • LH/RH Instrument Panel Courtesy Lamp
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • License Lamp
  • LH/RH Rear Park Stop Turn Lamp
  • LH/RH Coach Lamp
  • LH/RH Rear Side Marker Lamp
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • TFI Ignition Module
  • Ignition Switch
  • Electronic Engine Control Module
  • Ignition Coil
  • Spout Check Connector
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Power Mirror Switch
  • L/R Mirror Motor
  • Left And Right Mirror Switch
  • Directional Control Switch
  • Up Down Motor
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Illumination
  • Rear Defrost Control Switch
  • Rear Window Defrost Grid
  • On Indicator
  • Defrost Relay
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Trailer Battery Charging Relay
  • Trailer Exterior Lamps Relay
  • Trailer LH/RH Turn Relay
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Interval Governor
  • Windshield Wiper Motor
  • Multi-Function Switch
  • CLICK HERE TO GET FULL ACCESS TO 1991 Mercury Grand Marquis WIRING DIAGRAMS!

    Shop online for auto body parts, engines, wheels, lights...

    Click here to view more details about 1997 Mercury Grand Marquis Grille Insert1997 Mercury Grand Marquis Grille Insert, 1-piece design; With emblem provision; A high quality, OE replacement grille insert; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $56.53

    Click here to view more details about 2002 Mercury Grand Marquis Tail Light, Driver Side2002 Mercury Grand Marquis Tail Light, Driver Side, Bulbs not included; DOT and SAE approved; A high quality, OE replacement tail light; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $72.13

    Click here to view more details about 2011 Mercury Grand Marquis Power Door Mirror, Driver Side2011 Mercury Grand Marquis Power Door Mirror, Driver Side, DRIVER SIDE POWER DOOR MIRROR, WITH HEATED GLASS, PAINT TO MATCH [FO], , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $118.09

    Click here to view more details about 1988 Mercury Grand Marquis V8, 5 L, 302 CID Rebuilt Engine1988 Mercury Grand Marquis V8, 5 L, 302 CID Rebuilt Engine, Car, Not HO, Roller cam, 3/4" Long Reach Plugs., Warranty: 7-Year/70,000 Mile, .

    Source: Rebuilt Engines Store

    $1,524.00

    Click here to view more details2004 Mercury Grand Marquis Used Suspension Compressor/Pump, Air Susp Compressor, 8W1Z 5319 A, Very Good.

    Source: Used Auto Parts Store

    $169.00

    Click here to view more details2002 Mercury Grand Marquis Used Wiper Motor Front, Very Good.

    Source: Used Auto Parts Store

    $66.00
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