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Earls BRAKE LIGHT SWITCH - Pressure Activated

Brake light switch - Pressure activated w/ 1/8" NPT port - (2) 1/4" blade style electrical terminals.

PART# 100186ERL

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$13.70   Suggested Retail
$11.10   Holleydays Price
Free Shipping on orders over $100*
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This switch is not for use with Silicone Brake Fluid.


Brake light switch, pressure activated. This switch is an easy way to add brake lights to your vehicle, since the switch powers the brake light system using the hydraulic pressure from the brake line. Ideal for use w/ after-market pedals that don't have provisions for a brake light switch. Eliminates the hassle and complexity of modifying pedals for a mechanically operated brake light switch. This switch can also be used as a safety feature to prevent the engine from starting w/o the clutch pedal depressed (w/ hydraulic clutch & manual transmission). Plumb this switch in the clutch line and run the small wire than goes from the start switch on the ignition to the starter solenoid through this switch. This will prevent the engine from turning over, unless the clutch pedal is pressed in.


  • Switch is Normally Open and Closes when Activated at 60-100 PSI
  • 1/8" NPT Male Threads
  • (2) 1/4" Blade Style Terminals


Adapter NPT Size ( A )1/8 NPT MALE
Adapter TypeBrake Light Switch
Emission Code5
Product TypeBrake Light Switch
Part Number100186ERL


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Tech Resources

This switch is not for use with Silicone Brake Fluid.
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      *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

      Some parts are not legal for use in California or other states with similar regulations.

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