{"product_id":"stop-light-pressure-switch-wilwood","title":"Stop Light Pressure Switch - Wilwood","description":"\u003cp\u003eThe \u003cb\u003eWilwood Stop Light Pressure Switch (P\/N 300-11181)\u003c\/b\u003e is a heavy-duty, hydraulic-actuated brake light switch designed to activate a vehicle's brake lights in response to hydraulic line pressure. Commonly incorporated into custom street rod, muscle car, and race car brake plumbing, it provides a reliable, hidden alternative to mechanical brake pedal switches.\u003c\/p\u003e\n\u003ch3\u003eProduct Overview \u0026amp; Performance\u003c\/h3\u003e\n\u003cp\u003eMechanical brake pedal light switches require precise bracket alignment and can slip or fail over time. The Wilwood hydraulic pressure switch mounts directly into the brake fluid line, triggering the stop lights automatically as soon as driver foot pressure builds hydraulic pressure in the braking system.\u003c\/p\u003e\n\u003cp\u003eFeaturing a dual-pole electrical terminal layout, the internal circuit closes to illuminate the stop lights when hydraulic pressure reaches \u003cb\u003e60 to 100 PSI\u003c\/b\u003e—ensuring instant light activation during light pedal pressure while preventing false triggers from residual line pressure.\u003c\/p\u003e\n\u003ch3\u003eKey Features \u0026amp; Design Highlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eHydraulic Pressure Actuation:\u003c\/b\u003e Activates brake lights via line pressure, eliminating mechanical pedal switches and custom mounting brackets.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDual-Pole Circuit:\u003c\/b\u003e Features two screw-terminal contact posts for easy wiring into standard 12V automotive brake light circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eStandard 1\/8\" NPT Male Thread:\u003c\/b\u003e Features a \u003cspan class=\"math-inline\"\u003e1\/8\"\u003c\/span\u003e NPT pipe thread inlet for direct installation into proportioning valves, brake line blocks, or T-fittings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDirect Replacement Component:\u003c\/b\u003e Used as the standard replacement switch in Wilwood Combination Proportioning Valve Assemblies (Part # \u003cb\u003e260-11179\u003c\/b\u003e).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003ePlated Steel Housing:\u003c\/b\u003e Durable steel body with a protective plating to resist corrosion, brake fluid, and engine bay moisture.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specification Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature \/ Metric\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Specification Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eManufacturer \u0026amp; Part #\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eWilwood Engineering — \u003cb\u003eP\/N: 300-11181\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eSwitch Type\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHydraulic Pressure Actuated Stop Light Switch\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eTerminal Configuration\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDual Pole (2 Terminal Posts)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eInlet Thread Size\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cspan class=\"math-inline\"\u003e1\/8\"-27\u003c\/span\u003e Male NPT Pipe Thread\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eActuation Pressure Range\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cspan class=\"math-inline\"\u003e60 PSI\u003c\/span\u003e to \u003cspan class=\"math-inline\"\u003e100 PSI\u003c\/span\u003e Hydraulic Pressure\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eConstruction \/ Finish\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCorrosion-Resistant Plated Steel\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003eAssembly Fitment\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDirect replacement for Wilwood Combination Proportioning Valve # 260-11179\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eInstallation \u0026amp; Wiring Guidance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eThread Sealing:\u003c\/b\u003e Apply a small amount of Teflon tape or liquid thread sealant to the male 1\/8\" NPT threads, keeping sealant away from the leading edge to prevent brake fluid contamination.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSystem Bleeding:\u003c\/b\u003e After installing or replacing the pressure switch in a hydraulic port, thoroughly bleed the brake system to eliminate trapped air bubbles.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":52900838277252,"sku":"WIL 300-11181","price":12.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0286\/1180\/5316\/files\/300-11181-med.jpg?v=1790266609","url":"https:\/\/hotrodhardware.com\/products\/stop-light-pressure-switch-wilwood","provider":"Hot Rod Hardware","version":"1.0","type":"link"}