CAT Y Cable The opposite version allows a

The opposite version allows a marine accessory or tester to plug into a standard OBD2 connector

MEFI 5 Scan & TuneTM supports the following controllers:

the user can view real-time sensor readings in a variety of ways

This cable has a 12 pin OBD1 connector shell to plug in under your cars dash to interface to your cars ECM

which are single parameters

CAT Y Cable The opposite version allows aY cable for CAT systems. This cable includes one Female (sockets) connector to plug into your vehicle connected to two Male (pins) bulkhead connectors. This allows you to plug two accessories into one vehicle bulkhead connector. All 9 contacts are Y'ed through to the two vehicle side connectors: A: Battery B: Ground C: CAT Link Shield D: CAT Link High E: CAT Link Low F: J1939 High G: J1939 Low J: J1939 J1708 High H: J1939 J1708 Low