{"product_id":"mack-20489118-pressure-switch-replacement-pai-industries-853746","title":"PAI 853746 Pressure Switch │ Replaces Mack 20489118","description":"\u003cp\u003eThe PAI 853746 is an aftermarket air-brake stop-lamp \/ low-pressure switch for Mack and Volvo on-highway tractors. Normally-open contacts close at roughly 2-6 psi to power the brake-light circuit when service-brake air is applied. 2-pin oval connector, 2.44 in overall. Direct replacement for Mack\/Volvo 20489118.\u003c\/p\u003e\n\u003ch2\u003eSigns You Need a New Pressure Switch\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eBrake lights stay on with the pedal released\u003c\/li\u003e\n\u003cli\u003eBrake lights fail to illuminate when the service brake is applied\u003c\/li\u003e\n\u003cli\u003eIntermittent stop-lamp operation that comes and goes\u003c\/li\u003e\n\u003cli\u003eTrailer brake lights do not follow tractor commands\u003c\/li\u003e\n\u003cli\u003eVisible damage or corrosion at the switch body or connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003ePAI Industries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e853746\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart Type\u003c\/th\u003e\n\u003ctd\u003eAir-Brake Stop-Lamp Pressure Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eActivation\u003c\/th\u003e\n\u003ctd\u003eNormally Open, closes at 2-6 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eConnector\u003c\/th\u003e\n\u003ctd\u003e2-Pin Oval\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOverall Length\u003c\/th\u003e\n\u003ctd\u003e2.44 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eColor\/Finish\u003c\/th\u003e\n\u003ctd\u003eBlack \/ Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCross References\u003c\/h2\u003e\n\u003cp\u003eThis pressure switch replaces or is equivalent to the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMack:\u003c\/strong\u003e 20489118\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolvo:\u003c\/strong\u003e 20489118\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFleetpride:\u003c\/strong\u003e LST3632\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThis pressure switch fits Mack and Volvo on-highway tractors and vocational trucks calling for the 20489118 stop-lamp switch, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMack Anthem, Granite, Pinnacle, CHU, CXU, GU\u003c\/li\u003e\n\u003cli\u003eMack TerraPro, LR refuse\u003c\/li\u003e\n\u003cli\u003eVolvo VNL, VNM, VNR, VNX\u003c\/li\u003e\n\u003cli\u003eVolvo VHD vocational and VAH auto-hauler\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eVerify connector pinout, activation pressure, and switch location (stop-lamp vs low-air vs parking-brake circuit) before ordering — Mack and Volvo run multiple pressure switches on the same dash harness.\u003c\/em\u003e\u003c\/p\u003e","brand":"PAI Industries","offers":[{"title":"Default Title","offer_id":48683182293277,"sku":"853746","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/0730\/1991\/files\/853746_01_lg.jpg?v=1718849135","url":"https:\/\/www.allprodiesel.net\/products\/mack-20489118-pressure-switch-replacement-pai-industries-853746","provider":"All Pro Truck Parts","version":"1.0","type":"link"}