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<h2>What does a turn signal switch do?</h2>&nbsp;An automotive turn signal switch is a component in a car's steering column that enables the driver to indicate the direction in which they intend to turn or change lanes. When the driver moves the turn signal lever up or down, it activates a switch that sends an electrical signal to the car's turn signal lights, causing them to flash on the front and rear of the car to indicate the intended direction of the turn or lane change. In addition to indicating the direction of the turn, the turn signal switch also cancels the signal automatically after the turn is completed or when the steering wheel is straightened. The turn signal switch is an important safety feature in a car as it alerts other drivers of the driver's intended maneuver, reducing the risk of accidents or collisions.<h2>Turn signal switch replacement</h2>Replacing a turn signal switch is a task that may be required if the switch fails or malfunctions, causing the turn signals or hazard warning lights to stop working. It's important to ensure that the new switch is compatible with the vehicle's make and model and is of high quality to ensure safe and reliable operation.While replacing the turn signal switch can be done as a DIY project, it can be a complex task that requires mechanical skills and knowledge. If you're not confident in your ability to perform the task, it's best to seek the assistance of a professional mechanic.&nbsp;You can refer to these steps when you need to change the turn signal switch:<ol><li>Disconnect the battery</li><li>Remove the steering wheel cover</li><li>Remove the old turn signal switch. You may need to use a screwdriver or socket wrench to remove the screws.</li><li>Position the new turn signal switch in place and secure it using the mounting screws. Reconnect any electrical connectors that were removed earlier.</li><li>Once the new turn signal switch is in place, reattach the steering wheel or column cover, ensuring that all screws or clips are properly secured.</li><li>Finally, reconnect the negative battery cable to the battery and test the new turn signal switch by activating the turn signals and hazard warning lights.</li></ol>

Turn Signal Switch

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Air Cleaner

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Air Filter Box

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Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

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Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

1999 Mercury Mountaineer Turn Signal Switch

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