{"product_id":"cdi-cdm-module-test-harness-sierra-18-99554-marine-ignition-diagnostic-tool","title":"Sierra CDM Module Test Harness 18-99554 Marine Ignition Diagnostic Tool","description":"\u003cp\u003eThe Sierra 18-99554 is a CDI CDM module test harness built for diagnostic work on marine ignition systems. It provides the wiring connections technicians and boat owners need to check a CDM (capacitor discharge module) without cutting into or damaging the boat's existing engine harness. Keeping the factory wiring intact during testing helps avoid accidental short circuits or connector damage that can occur when probing wires directly.\u003c\/p\u003e\u003cp\u003eThis harness is part of Sierra's line of marine diagnostic tools and is intended for use by technicians and DIY boat owners performing ignition troubleshooting. It is a lightweight, compact tool designed to be kept in a toolbox or service kit for quick access during engine diagnostics.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-99554\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Marine Diagnostic Tools\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282395681\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-99554?\u003c\/strong\u003e It is a CDI CDM module test harness, a marine diagnostic tool made by Sierra for testing CDM ignition modules, identified by UPC 808282395681.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-99554 test harness weigh?\u003c\/strong\u003e The Sierra CDM module test harness weighs 0.4 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99554 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-99554 is the Sierra manufacturer part number for this CDM module test harness, not an aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of product is this?\u003c\/strong\u003e Sierra part 18-99554 is listed in the Marine Diagnostic Tools category.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a CDM module test harness used for?\u003c\/strong\u003e A CDM module test harness like the Sierra 18-99554 is used to connect diagnostic equipment to a CDI CDM ignition module for testing purposes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-99554 replace the boat's factory wiring harness?\u003c\/strong\u003e No, the Sierra 18-99554 is a test harness used alongside the existing wiring for diagnostic purposes; it is not a replacement wiring harness.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow can I identify the correct Sierra test harness for my CDM diagnostics?\u003c\/strong\u003e Look for part number 18-99554 on the Sierra CDM module test harness, and confirm it against UPC 808282395681.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-99554 lightweight enough for a mobile toolkit?\u003c\/strong\u003e At 0.4 pounds, the Sierra CDM module test harness is light enough to carry in a marine technician's toolbox or service kit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988446621915,"sku":"SIE-18-99554","price":138.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/CDI-511-5207A1_lg__11671.1558113625.500.750.jpg?v=1785329152","url":"https:\/\/www.goodvibesmarina.com\/products\/cdi-cdm-module-test-harness-sierra-18-99554-marine-ignition-diagnostic-tool","provider":"Good Vibes Marina","version":"1.0","type":"link"}