Mercury – Dual-Helm Malfunction Light Harness | 10-Foot Cable | 84-8M0048040Mercury Dual Helm Malfunction Light Harness 10 Foot Cable 84 8M0048040 Overview Dual helm boats need a clean way to send catalyst warning signals to the dash light at the upper or secondary helm. The Mercury 84 8M0048040 Dual Helm Malfunction Light Harness provides a 10 foot connection dedicated to dual helm layouts, ensuring the catalyst malfunction light receives the proper OBDM alert from any catalyst equipped MerCruiser engine. It keeps the
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