Mercury - Key Switch Harness Kit Non-DTS 14-Pin Ignition Wiring Kit 896537K08. The Mercury Key Switch Harness Kit (Non-DTS 14-Pin) is designed for mechanical outboard applications that use non-DTS fourteen-pin ignition systems. It is commonly selected during repowers or rigging updates when existing ignition wiring needs to be replaced or simplified. The extended harness length allows for cleaner routing behind the dash without forcing tight bends or awkward positioning.. Maintaining a properly