{"product_id":"mercury-harnes-1helm-15ft-84-8m0048054","title":"Mercury – Malfunction Light Harness | 15-Foot Single-Helm Cable | 84-8M0048054","description":"\u003cp data-start=\"0\" data-end=\"82\"\u003e\u003cstrong data-start=\"0\" data-end=\"82\"\u003eMercury – Malfunction Light Harness | 15-Foot Single-Helm Cable | 84-8M0048054\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"84\" data-end=\"87\"\u003e\n\u003cp data-start=\"89\" data-end=\"101\"\u003e\u003cstrong data-start=\"89\" data-end=\"101\"\u003eOverview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"103\" data-end=\"645\"\u003eCatalyst-equipped MerCruiser engines need a clean and dependable connection to the dash-mounted malfunction light, and this harness provides exactly that. The Mercury 84-8M0048054 Malfunction Light Harness gives you fifteen feet of length—ideal for single-helm boats that require a longer routing path from the engine compartment to the dash. Once installed, it ensures the catalyst warning light comes on the moment the OBDM system detects a fault, giving you the same kind of early alert you’d expect from a check-engine light in a vehicle.\u003c\/p\u003e\n\u003chr data-start=\"647\" data-end=\"650\"\u003e\n\u003cp data-start=\"652\" data-end=\"668\"\u003e\u003cstrong data-start=\"652\" data-end=\"668\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"672\" data-end=\"776\"\u003e\n\u003cstrong data-start=\"672\" data-end=\"695\"\u003e15-Foot Extension –\u003c\/strong\u003e Designed for single-helm layouts that need more reach than standard harnesses.\u003c\/li\u003e\n\u003cli data-start=\"779\" data-end=\"877\"\u003e\n\u003cstrong data-start=\"779\" data-end=\"801\"\u003eOBDM Signal Path –\u003c\/strong\u003e Carries catalyst malfunction alerts directly to the dash indicator light.\u003c\/li\u003e\n\u003cli data-start=\"880\" data-end=\"980\"\u003e\n\u003cstrong data-start=\"880\" data-end=\"912\"\u003eCatalyst-Engine Compatible –\u003c\/strong\u003e Built for all MerCruiser engines equipped with a catalyst system.\u003c\/li\u003e\n\u003cli data-start=\"983\" data-end=\"1088\"\u003e\n\u003cstrong data-start=\"983\" data-end=\"1006\"\u003eOEM Connector Fit –\u003c\/strong\u003e Factory Mercury connectors ensure proper pin alignment and a secure connection.\u003c\/li\u003e\n\u003cli data-start=\"1091\" data-end=\"1203\"\u003e\n\u003cstrong data-start=\"1091\" data-end=\"1120\"\u003eFlexible Routing Design –\u003c\/strong\u003e Long enough to run through consoles, rigging tunnels, and tight bulkhead spaces.\u003c\/li\u003e\n\u003cli data-start=\"1206\" data-end=\"1314\"\u003e\n\u003cstrong data-start=\"1206\" data-end=\"1235\"\u003eReliable Alert Delivery –\u003c\/strong\u003e Ensures the malfunction light activates accurately when service is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1316\" data-end=\"1319\"\u003e\n\u003cp data-start=\"1321\" data-end=\"1338\"\u003e\u003cstrong data-start=\"1321\" data-end=\"1338\"\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1342\" data-end=\"1388\"\u003eAll \u003cstrong data-start=\"1346\" data-end=\"1386\"\u003eMerCruiser catalyst-equipped engines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1391\" data-end=\"1444\"\u003eDash-mounted Catalyst Malfunction Light (8M0046481)\u003c\/li\u003e\n\u003cli data-start=\"1447\" data-end=\"1502\"\u003eSingle-helm installations requiring a 15-foot harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1504\" data-end=\"1507\"\u003e\n\u003cp data-start=\"1509\" data-end=\"1545\"\u003e\u003cstrong data-start=\"1509\" data-end=\"1545\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1547\" data-end=\"1943\"\u003eWith extra length for more complex helm layouts, this harness allows for clean, strain-free routing from the engine to the dash. It keeps the malfunction light tied directly into the catalyst monitoring system, ensuring you see an alert right away if the engine logs a catalyst-related fault. It’s an easy way to maintain proper oversight of the emissions system without adding a complex display.\u003c\/p\u003e\n\u003chr data-start=\"1945\" data-end=\"1948\"\u003e\n\u003cp data-start=\"1950\" data-end=\"1965\"\u003e\u003cstrong data-start=\"1950\" data-end=\"1965\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1967\" data-end=\"2383\"\u003eCatalyst alerts are tied to important emissions and engine-protection functions. Mercury’s OEM harness ensures the warning light receives a clean, accurate signal. Knockoff harnesses often suffer from loose connections or incorrect wiring, which can lead to false alarms or no alarm at all. The OEM version is built with proper shielding, durable connectors, and the right electrical logic for long-term reliability.\u003c\/p\u003e\n\u003chr data-start=\"2385\" data-end=\"2388\"\u003e\n\u003cp data-start=\"2390\" data-end=\"2397\"\u003e\u003cstrong data-start=\"2390\" data-end=\"2397\"\u003eFAQ\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2399\" data-end=\"2537\"\u003e\u003cstrong data-start=\"2399\" data-end=\"2447\"\u003eQ1: What does this harness actually connect?\u003c\/strong\u003e\u003cbr data-start=\"2447\" data-end=\"2450\"\u003eIt links the engine’s OBDM catalyst-alert signal to the dash-mounted malfunction light.\u003c\/p\u003e\n\u003cp data-start=\"2539\" data-end=\"2667\"\u003e\u003cstrong data-start=\"2539\" data-end=\"2578\"\u003eQ2: Why choose the 15-foot version?\u003c\/strong\u003e\u003cbr data-start=\"2578\" data-end=\"2581\"\u003eIt’s ideal for single-helm boats that need a longer harness to reach the dash cleanly.\u003c\/p\u003e\n\u003cp data-start=\"2669\" data-end=\"2779\"\u003e\u003cstrong data-start=\"2669\" data-end=\"2722\"\u003eQ3: Does this harness fit all MerCruiser engines?\u003c\/strong\u003e\u003cbr data-start=\"2722\" data-end=\"2725\"\u003eIt fits \u003cstrong data-start=\"2733\" data-end=\"2759\"\u003eonly catalyst-equipped\u003c\/strong\u003e MerCruiser engines.\u003c\/p\u003e\n\u003cp data-start=\"2781\" data-end=\"2884\"\u003e\u003cstrong data-start=\"2781\" data-end=\"2823\"\u003eQ4: Is the malfunction light included?\u003c\/strong\u003e\u003cbr data-start=\"2823\" data-end=\"2826\"\u003eNo. The light is sold separately as part number 8M0046481.\u003c\/p\u003e\n\u003cp data-start=\"2886\" data-end=\"3004\"\u003e\u003cstrong data-start=\"2886\" data-end=\"2922\"\u003eQ5: Is installation complicated?\u003c\/strong\u003e\u003cbr data-start=\"2922\" data-end=\"2925\"\u003eNo. It plugs in using OEM connectors and routes like any standard dash harness.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936019763491,"sku":"84-8M0048054","price":19.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV703953.jpg?v=1698795794","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-harnes-1helm-15ft-84-8m0048054","provider":"PartsVu","version":"1.0","type":"link"}