1978 Mercury Grand Marquis Light Relays, Sensors, Control Modules
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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
- 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®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
- Standard®Handypack™ Back Up Light SocketMercury Grand Marquis 1978, Handypack™ Back Up Light Socket by Standard®. With 2 Wires. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and...The handypack™ program is the most complete wiring center. Featuring application and non-application electrical products, handypack™ has the products and tools needed to get your electrical job done rightPigtail and Socket Assembly$8.03
- Standard®Handypack™ Brake Light Switch ConnectorMercury Grand Marquis Without Hydro-Boost Brakes 1978, Handypack™ Brake Light Switch Connector by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products,...Premium parts you can rely onDesigned to restore functionality$9.71
- Standard®Handypack™ Dimmer Switch ConnectorMercury Grand Marquis 1978, Handypack™ Dimmer Switch Connector by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...Premium parts you can rely onDesigned to restore functionality$3.37
- Standard®Hazard Warning RelayMercury Grand Marquis 1978, Hazard Warning Relay 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...Premium parts you can rely onDesigned to restore functionality$20.37
- Standard®Headlight Dimmer Switch ConnectorMercury Grand Marquis 1978, Headlight Dimmer Switch Connector by Standard®. Finish: Black. Harness Length: 13 1/2". Wire Quantity: 3. Standard is to be the leading independent supplier to the automotive aftermarket, providing the...Offering hundreds of high-quality pigtails and sockets for nearly every electrical jobUtilizing high grade materials to ensure peak conductivity and perfect connections$5.21
- WVE®Dimmer Switch ConnectorMercury Grand Marquis With Floor Mounted Dimmer Switch 1978, Dimmer 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...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$4.04
- WVE®Hazard Warning Flasher ConnectorMercury Grand Marquis 1978, Hazard Warning Flasher Connector by WVE®. With 3 Terminals. 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$2.55
- WVE®High Beam Headlight SocketMercury Grand Marquis 1978, Headlight Socket by WVE®. High Beam. With 2 Terminals. With 2 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$10.02
- United Motor Products®Headlight Dimmer Switch ConnectorMercury Grand Marquis 1978, Headlight Dimmer Switch Connector by United Motor Products®. Without Locking Tabs. Looking to maintain the top condition of your electrical system? We are ready to help you! Just choose from our immense...Designed to help restore the performance of your electrical systemMade from high-grade materials using the latest techniques$3.73
- Diode Dynamics®Inline ResistorMercury Grand Marquis 1978, Inline Resistor by Diode Dynamics®. Quantity: 2 Pieces. This is a pair of inline resistors, designed for use with 194, 168, or 921 size bulb applications. Each resistor draws 5 watts of power, the same as a...Designed to help restore the performance of your electrical systemMade from high-grade materials using the latest techniques$10.00
- Race Sport®OEM Factory Replacement BallastOEM Factory Replacement Ballast by Race Sport®. These individual OEM HID Replacement ballasts ensure that your vehicle's lighting is always working. This product is made of high-quality materials to serve you for years to come. Designed...Single 35W OEM D4 Style HID Replacement BallastIncludes mounting hardware$64.99 - $99.99
- Race Sport®High Intensity Discharge Lighting BallastHigh Intensity Discharge Lighting Ballast by Race Sport®. 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 electrical parts...Includes mounting hardwareDoes not include bulbs, additional wiring, or harnesses$34.99 - $44.99
- Race Sport®High Intensity Discharge Lighting BallastHigh Intensity Discharge Lighting Ballast by Race Sport®. 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 electrical parts...Constructed of high-quality materialsRugged construction to withstand harsh conditions$6.99 - $39.99
- Diode Dynamics®HYLUX D2 HID BallastHYLUX D2 HID Ballast by Diode Dynamics®. Quantity: 1 Piece. 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 electrical parts...Designed to help restore the performance of your electrical systemMade from high-grade materials using the latest techniques$100.00
- Painless Performance®LED FlasherLED Flasher by Painless Performance®. LED Turn Signal lights do not draw enough current to trigger most thermal flashers. The Painless LED flasher has a miniature circuit board and relay to operate the flasher to keep your LED's bright...High quality at an affordable priceExpertly made from premium materials$22.92
- Truck-Lite®Headlight Wiring Harness ConnectorHeadlight Wiring Harness Connector by Truck-Lite®. 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 manufactured to...Expertly crafted from premium materialsDesigned to match rigorous quality standards$2.35 - $61.86
- Dorman®3-Wire with Fiber Optic Headlight3-Wire with Fiber Optic Headlight by Dorman®. Dorman offers a comprehensive line of Headlight Switch Connectors for a wide range of applications. All the Headlight Switch Connectors are constructed of high-quality materials for...Direct replacement Headlight Switch Connectors available to ensure a proper fitVehicle try-on testing has been conducted on this part to ensure a trouble-free performance$7.04
- Dorman®Conduct-Tite™ Relay (4 Pin, 30 Amp, 12 Volt)Conduct-Tite™ Relay (4 Pin, 30 Amp, 12 Volt) by Dorman®. Amperage: 30 Amp. Voltage: 12V. Terminal Gender: Male, Terminal Material: Plastic, Terminal Type: Blade, Wire Gauge: Not Applicable. Dorman offers a comprehensive line of Relay...Reduces voltage drops and helps maintain optimum operating currentAvailable for both 4- and 5-pin connections$5.50
- Dorman®Conduct-Tite™ Tower Housing Technician TerminalConduct-Tite™ Tower Housing Technician Terminal by Dorman®. Material: Plastic. Dorman offers a comprehensive line of Weather Pack Series Connectors for almost any automotive electrical repair. All Dorman's Weather Pack Series...Available in many different styles including PVC and weatherproofA large selection of wire gauges available$1.99 - $2.06
- Dorman®Conduct-Tite™ Wire Contact SocketConduct-Tite™ Wire Contact Socket by Dorman®. Dorman offers a comprehensive line of Lighting Socket for a wide range of applications. All Dorman's Lighting Socket are constructed of high-quality materials for long-lasting durability....Designed to help restore the performance of your electrical systemMade from high-grade materials using the latest techniques$1.96 - $13.13
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