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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:
  • Main Light Switch
  • Dimmer
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Main Light Switch
  • Dimmer
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Left Front Door Speaker
  • Right Rear Speaker
  • Power Antenna Switch
  • Left Rear Speaker
  • Right Front Door Speaker
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Four-Channel Amplifier
  • 1991 Mercury Grand Marquis  5.0 V8 GAS Wiring Diagram1991 Mercury Grand Marquis 5.0 V8 GAS Wiring Diagram

    Components on diagram:
  • Radio
  • Four-Channel Amplifier
  • 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:
  • Cargo Lamp
  • Tailgate Switch
  • Map Dome Lamp
  • LH/RH Vanity 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:
  • Interval Governor
  • Windshield Wiper Motor
  • Multi-Function Switch
  • CLICK HERE TO GET FULL ACCESS TO 1991 Mercury Grand Marquis WIRING DIAGRAMS!

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    Click here to view more details about 1997 Mercury Grand Marquis Header Panel1997 Mercury Grand Marquis Header Panel, A high quality, direct fit OE replacement header panel; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $166.47

    Click here to view more details about 2008 Mercury Grand Marquis Hood Latch2008 Mercury Grand Marquis Hood Latch, A high quality, OE replacement hood latch; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $20.37

    Click here to view more details2010 Mercury Grand Marquis Center Cap, Wheel Center Cap; Fits ALY03776; Grnd Marq OE Chrome; Used, , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $17.50

    Click here to view more details1995 Mercury Grand Marquis V8, 4.6 L, 281 CID Rebuilt Engine, SOHC, with MFI, AODE transmission., Warranty: 3-Year/100,000 Mile, .

    Source: Rebuilt Engines Store

    $2,530.00

    Click here to view more details1979 Mercury Grand Marquis Used Alternator, 5.8, AUTO, 4X4 70 AMP, Very Good.

    Source: Used Auto Parts Store

    $99.00

    Click here to view more details2009 Mercury Grand Marquis Used Heater and A/C controls, Without ATC, Very Good.

    Source: Used Auto Parts Store

    $86.00
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