1978 Mercury Grand Marquis Electrical Parts
- Light Switches
- Light Relays + Sensors
- Fuses
- Wiring & Cables
- Replacement Gauges
- Power + Heated Seats
- Cruise Control
- Horns
- Door Lock Actuators + Switches
- Window Motors + Switches
- Alternators
- Starters
- Batteries
- Voltage Regulators
- A/C Relays, Sensors
- Fuel Sensors & Switches
- Cooling System Switches, Sensors & Relays
- Oxygen Sensors
- Engine Sensors, Relays, Switches & Connectors
- Solenoids, Sensors, Switches, Control Units
- Relays, Cables & Connectors
- Brake System Sensors
- Steering Valves, Relays & Sensors
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Standard®Headlight SwitchMercury Grand Marquis 1978, Headlight Switch by Standard®. Without Extension Bracket. Connector Type: 8 Blade Male Terminals. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest...Premium parts you can rely onDesigned to restore functionality$25.63 - ACDelco®Professional™ HornMercury Grand Marquis 1978, Professional™ Horn by ACDelco®. Looking to maintain the top condition of your electrical system? We are ready to help you! Just choose from their immense selection of premium replacement electrical parts...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$31.62 - $31.81
- Cardone Reman®Remanufactured Power Window MotorMercury Grand Marquis 1978, Remanufactured Power Window Motor by Cardone Reman®. Connector Quantity: 2. Number of Mouting Holes: 3. Without Regulator. Mounting Type: Through Hole. With Gear. Each unit is 100% tested at 3 points for...Designed with the latest software and manufactured with modern toolingManufactured from the highest quality materials$51.17 - $62.19
- Dorman®Turn Signal CamMercury Grand Marquis 1978, Turn Signal Cam by Dorman®. Looking to maintain the top condition of your electrical system? Dorman is ready to help you! Just choose from their immense selection of premium replacement electrical parts...Engineered from high-quality materials for a long service lifeComes with all essential installation hardware$14.49 - $17.60
- Standard®Tru-Tech™ Headlight SwitchMercury Grand Marquis 1978, Tru-Tech™ Headlight Switch by Standard®. Without Extension Bracket. Connector Type: 8 Blade Male Terminals. Standard is to be the leading independent supplier to the automotive aftermarket, providing the...Premium parts you can rely onDesigned to restore functionality$18.57
- Standard®Floor Dimmer SwitchMercury Grand Marquis 1978, Floor Dimmer Switch by Standard®. Location: Floor Mounted. Connector Type: 3 Blade Male Terminals. Foot Operated. Standard is to be the leading independent supplier to the automotive aftermarket, providing...Premium parts you can rely onDesigned to restore functionality$12.29
- WVE®Brake Light SwitchMercury Grand Marquis 1978, Brake Light Switch by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$13.05 - $18.51
- WVE®Dimmer SwitchMercury Grand Marquis 1978, Dimmer Switch by WVE®. With 2 Vertical and 1 Horizontal Blade Terminals. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$9.50
- WVE®Headlight SwitchMercury Grand Marquis 1978, Headlight Switch by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$38.46
- Pioneer Automotive®Speedometer CableMercury Grand Marquis 1978, Speedometer Cable by Pioneer Automotive®. Looking to maintain the top condition of your electrical system? They are ready to help you! Just choose from their immense selection of premium replacement...Made to deliver reliable service for a long timeRugged construction to withstand harsh conditions$12.32 - $18.07
- Standard®Brake Light SwitchMercury Grand Marquis 1978, Brake Light Switch by Standard®. Connector Type: 2 Blade Male Terminals. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive...Premium parts you can rely onDesigned to restore functionality$14.18 - $15.96
- TRQ®Headlight Dimmer SwitchMercury Grand Marquis Floor Mounted 1978, Headlight Dimmer Switch by TRQ®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Intended to bring your vehicle back to its original gloryBudget-friendly alternative to the OEM part$17.81$18.95Save $1.14 (6%)
- Standard®Tru-Tech™ Floor Dimmer SwitchMercury Grand Marquis 1978, Tru-Tech™ Floor Dimmer Switch by Standard®. Foot Operated. Location: on Floor. Connector Type: 3 Male Terminals. Foot Operated. Standard is to be the leading independent supplier to the automotive...Premium parts you can rely onDesigned to restore functionality$5.74
- Standard®Turn Signal CamMercury Grand Marquis With Tilt Steering Wheel 1978, Turn Signal Cam by Standard®. Connector Type: 2 Way Terminals. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality...Standard switches are designed using copper alloy conductors to ensure superior electrical conductivity with low resistive lossesStandard parts are 100% tested to verify both mechanical and electrical switching performance$30.87
- SKP®Headlight Dimmer SwitchMercury Grand Marquis 6.6L 1978, Headlight Dimmer Switch by SKP®. Foot Operated. Location: Floor Mounted. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced...Precise engineering ensures second to none quality and lasting valueStringently tested with the highest quality standards$3.90
- Original Engine Management®Floor Dimmer SwitchMercury Grand Marquis 1978, Floor Dimmer Switch by Original Engine Management®. Looking to maintain the top condition of your electrical system? We are ready to help you! Just choose from our immense selection of premium replacement...Made to deliver trouble-free operation for years aheadManufactured with cutting-edge technology$5.80
- Forecast®Headlight Dimmer SwitchMercury Grand Marquis 1978, Headlight Dimmer Switch by Forecast®. Looking to maintain the top condition of your electrical system? We are ready to help you! Just choose from our immense selection of premium replacement electrical parts...High quality at an affordable priceExpertly made from premium materials$10.42
- ATP®Speedometer CableMercury Grand Marquis Without Cruise Control 1978, Speedometer Cable by ATP®. End Side 1: Male. End Side 2: Male. Length: 63". Make sure your vehicle runs at safe speed and you are out of risk of being stopped by the police by replacing...Ensures that the speedometer works at its peakOE quality at an affordable price$11.94
- Dorman®Conduct-Tite™ Parking Light Bulb SocketMercury Grand Marquis 1978, Conduct-Tite™ Parking Light Bulb Socket by Dorman®. Wire Quantity: 3. Looking to maintain the top condition of your electrical system? Dorman is ready to help you! Just choose from their immense selection...Bulb simply plugs into socket for ease of installationDirect replacement engine coolant temperature sensor connectors available (where applicable) to ensure a proper fit$17.96 - $19.14
- Standard®Brake Light Switch ConnectorMercury Grand Marquis Without Hydro-Boost Brakes 1978, Brake Light Switch Connector by Standard®. 2nd Design. Harness Length: 7". Wire Quantity: 2. Standard is to be the leading independent supplier to the automotive aftermarket,...Offering hundreds of high-quality pigtails and sockets for nearly every electrical jobUtilizing high grade materials to ensure peak conductivity and perfect connections$15.74
- Dorman®Conduct-Tite™ Rear Turn Signal Light SocketMercury Grand Marquis 1978, Conduct-Tite™ Turn Signal Light Socket by Dorman®. Rear. Length: 10" with Wire (2" without Wire). Wire Quantity: 3. Looking to maintain the top condition of your electrical system? Dorman is ready to help...Connector included for easy mounting to the tail lightDirect replacement for a proper fit$10.31
- WVE®Brake Light Switch ConnectorMercury Grand Marquis Without Hydro-Boost Brakes 1978, Brake Light Switch Connector by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$12.61
- United Motor Products®Side Marker Light SocketMercury Grand Marquis 1978, Side Marker Light Socket by United Motor Products®. Finish: Cream and White. Size: 1". Shape: Straight. Wire Quantity: 2. 180 Degrees. Looking to maintain the top condition of your electrical system? We are...Designed to help restore the performance of your electrical systemMade from high-grade materials using the latest techniques$2.17
- Dorman®Conduct-Tite™ Headlight ConnectorMercury Grand Marquis 1978, Conduct-Tite™ Headlight Connector by Dorman®. With insulation that’s as secure as it is durable, Dorman’s Pigtail Headlight Connector prevents the corrosion, overheating, and melting that commonly cause...Direct replacement for ease of installationSave time and expense by replacing only the connector, not the entire harness$1.98 - $2.44
- WVE®Side Marker Light SocketMercury Grand Marquis 1978, Side Marker Light Socket by WVE®. With Square Locking Tabs. Finish: Tan. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$2.56
- Dorman®Side Marker Light SocketMercury Grand Marquis 1978, Side Marker Light Socket by Dorman®. Short Straight Push In Style. With 2 Wires. Wire Quantity: 2. Dorman offers a comprehensive line of Side Marker Light Sockets for a wide range of applications. All Dorman...No special tools required for installationEasy to install$2.08
- Dorman®Conduct-Tite™ High Temperature Headlight Standard SocketMercury Grand Marquis With High Temperature Socket 1978, Conduct-Tite™ High Temperature Headlight Standard Socket by Dorman®. Length: 7" with Wire (1" Without Wire). Make better electrical repairs and accessory installations with this...Professional appearance - this electrical pigtail is designed for a clean, professional look when installedConvenient solution - this pigtail connector allows the circuit to be quickly disconnected for service or occasional use$8.87
- Dorman®TECHoice™ Headlight Switch Light SocketMercury Grand Marquis 1978, TECHoice™ Headlight Switch Light Socket by Dorman®. Engagement of the four-wheel drive system is crucial during slick weather conditions. Dorman provides you with the security of knowing that your switch...Easy installation; just plug it in to the mating componentDirect replacement matches original design$9.00
- Standard®Back Up Light SocketMercury Grand Marquis 1978, Back Up Light Socket by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Offering hundreds of high-quality pigtails and sockets for nearly every electrical jobUtilizing high grade materials to ensure peak conductivity and perfect connections$11.50
- Standard®Flasher ConnectorMercury Grand Marquis 1978, Flasher Connector by Standard®. Finish: Red. Harness Length: 18". Wire Quantity: 2. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products,...Offering hundreds of high-quality pigtails and sockets for nearly every electrical jobUtilizing high grade materials to ensure peak conductivity and perfect connections$23.54
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