{"product_id":"mercury-harnes-1helm-20ft-84-8m0048055","title":"Mercury – Malfunction Light Harness | 20-Foot Single-Helm Cable | 84-8M0048055","description":"\u003cp data-start=\"0\" data-end=\"82\"\u003e\u003cstrong data-start=\"0\" data-end=\"82\"\u003eMercury – Malfunction Light Harness | 20-Foot Single-Helm Cable | 84-8M0048055\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=\"548\"\u003eCatalyst-equipped MerCruiser engines rely on a clear dash-mounted indicator to alert you when the catalyst system needs attention. The Mercury 84-8M0048055 Malfunction Light Harness gives you a 20-foot run—ideal for single-helm boats with longer distances between the engine compartment and the dash. Once connected, it provides a clean, reliable path for the OBDM catalyst warning signal so the light can turn on the moment a fault is detected.\u003c\/p\u003e\n\u003chr data-start=\"550\" data-end=\"553\"\u003e\n\u003cp data-start=\"555\" data-end=\"571\"\u003e\u003cstrong data-start=\"555\" data-end=\"571\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"575\" data-end=\"670\"\u003e\n\u003cstrong data-start=\"575\" data-end=\"596\"\u003e20-Foot Harness –\u003c\/strong\u003e Extra length for single-helm boats with deep or extended routing paths.\u003c\/li\u003e\n\u003cli data-start=\"673\" data-end=\"779\"\u003e\n\u003cstrong data-start=\"673\" data-end=\"700\"\u003eOBDM Alert Connection –\u003c\/strong\u003e Carries catalyst malfunction signals directly to the dash-mounted indicator.\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"870\"\u003e\n\u003cstrong data-start=\"782\" data-end=\"807\"\u003eCatalyst-Compatible –\u003c\/strong\u003e Fits all MerCruiser engines equipped with a catalyst system.\u003c\/li\u003e\n\u003cli data-start=\"873\" data-end=\"982\"\u003e\n\u003cstrong data-start=\"873\" data-end=\"893\"\u003eOEM Connectors –\u003c\/strong\u003e Factory Mercury ends ensure a proper fit and a secure, vibration-resistant connection.\u003c\/li\u003e\n\u003cli data-start=\"985\" data-end=\"1090\"\u003e\n\u003cstrong data-start=\"985\" data-end=\"1007\"\u003eFlexible Routing –\u003c\/strong\u003e Long enough to run through rigging tunnels, bulkheads, and tight console spaces.\u003c\/li\u003e\n\u003cli data-start=\"1093\" data-end=\"1199\"\u003e\n\u003cstrong data-start=\"1093\" data-end=\"1124\"\u003eAccurate Warning Delivery –\u003c\/strong\u003e Ensures the malfunction light activates promptly when service is needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1201\" data-end=\"1204\"\u003e\n\u003cp data-start=\"1206\" data-end=\"1223\"\u003e\u003cstrong data-start=\"1206\" data-end=\"1223\"\u003eCompatibility\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-start=\"1227\" data-end=\"1273\"\u003eAll \u003cstrong data-start=\"1231\" data-end=\"1271\"\u003eMerCruiser catalyst-equipped engines\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1276\" data-end=\"1329\"\u003eDash-mounted Catalyst Malfunction Light (8M0046481)\u003c\/li\u003e\n\u003cli data-start=\"1332\" data-end=\"1387\"\u003eSingle-helm installations requiring a 20-foot harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1389\" data-end=\"1392\"\u003e\n\u003cp data-start=\"1394\" data-end=\"1430\"\u003e\u003cstrong data-start=\"1394\" data-end=\"1430\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1432\" data-end=\"1792\"\u003eThis harness provides the length needed for clean, stress-free routing on larger or more complex helm layouts. Once in place, the malfunction light becomes a dependable visual cue—similar to a check-engine light—alerting you quickly to catalyst faults. It helps you stay ahead of emissions-system issues without adding additional displays or wiring complexity.\u003c\/p\u003e\n\u003chr data-start=\"1794\" data-end=\"1797\"\u003e\n\u003cp data-start=\"1799\" data-end=\"1814\"\u003e\u003cstrong data-start=\"1799\" data-end=\"1814\"\u003eWhy Buy OEM\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1816\" data-end=\"2196\"\u003eCatalyst alerts are tied to essential engine protection routines. Mercury’s OEM harness ensures the signal is carried correctly and the warning light behaves exactly as intended. Aftermarket harnesses often suffer from poor pin alignment or weak shielding, leading to unreliable alerts. The OEM version offers the durability and electrical accuracy needed in a marine environment.\u003c\/p\u003e\n\u003chr data-start=\"2198\" data-end=\"2201\"\u003e\n\u003cp data-start=\"2203\" data-end=\"2210\"\u003e\u003cstrong data-start=\"2203\" data-end=\"2210\"\u003eFAQ\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2212\" data-end=\"2342\"\u003e\u003cstrong data-start=\"2212\" data-end=\"2251\"\u003eQ1: What does this harness connect?\u003c\/strong\u003e\u003cbr data-start=\"2251\" data-end=\"2254\"\u003eIt links the engine’s OBDM catalyst alert circuit to the dash-mounted malfunction light.\u003c\/p\u003e\n\u003cp data-start=\"2344\" data-end=\"2468\"\u003e\u003cstrong data-start=\"2344\" data-end=\"2383\"\u003eQ2: Why choose the 20-foot version?\u003c\/strong\u003e\u003cbr data-start=\"2383\" data-end=\"2386\"\u003eIt’s ideal for single-helm boats that need extra length to reach the dash cleanly.\u003c\/p\u003e\n\u003cp data-start=\"2470\" data-end=\"2592\"\u003e\u003cstrong data-start=\"2470\" data-end=\"2518\"\u003eQ3: Will this work on any MerCruiser engine?\u003c\/strong\u003e\u003cbr data-start=\"2518\" data-end=\"2521\"\u003eIt works on \u003cstrong data-start=\"2533\" data-end=\"2591\"\u003eall MerCruiser engines equipped with a catalyst system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"2594\" data-end=\"2706\"\u003e\u003cstrong data-start=\"2594\" data-end=\"2636\"\u003eQ4: Is the malfunction light included?\u003c\/strong\u003e\u003cbr data-start=\"2636\" data-end=\"2639\"\u003eNo. The indicator light is sold separately (part number 8M0046481).\u003c\/p\u003e\n\u003cp data-start=\"2708\" data-end=\"2830\"\u003e\u003cstrong data-start=\"2708\" data-end=\"2748\"\u003eQ5: Is installation straightforward?\u003c\/strong\u003e\u003cbr data-start=\"2748\" data-end=\"2751\"\u003eYes. It installs with OEM connectors and routes like any standard dash harness.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46936019665187,"sku":"84-8M0048055","price":21.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/PV705602.jpg?v=1698795794","url":"https:\/\/partsvu.com\/en-ca\/products\/mercury-harnes-1helm-20ft-84-8m0048055","provider":"PartsVu","version":"1.0","type":"link"}