Installation Manual

Electrical Installation

Twin Disc, Incorporated

120

Twin Disc Display Harness Wiring

Install the Twin Disc Display Harness Assembly and the Display Power Harness as follows (See Figure 45):

Refer to General Electrical Installation Guidelines before proceeding with this section.

1.

Align the 3-pin plug of the J1939 Can harness with the 3-pin receptacle of the Twin Disc Display and push together until the lock snaps into place.

2.

3.

Install a J1939 T-Connector into the remaining 3-pin plug of the J1939

Can harness.

Install a 3-pin plug of the Communications harness into the J1939 T-

Connector.

4.

5.

Align the 6-pin plug of the Display Power harness with the 6-pin receptacle of the Twin Disc Display and push together until the lock snaps into place.

Route the short black wire to the Control Head.

7.

8.

6.

9.

Access the Control Head connector.

Note: The Control Head may be removed from the dash if this facilitates making the connection. If it is removed, then reinstall it after the connections have been made.

Disconnect the Control Head harness from the Control Head.

Install the short black wire of the Display Power harness into the Control head receptacle (position E for a port lever application, position J for a starboard lever application).

Route the Display Power harness and the Communications harness to the EC300 Control.

10.

Install a J1939 T-Connector into the 3-pin plug of the Multiple Display

Adapter harness.

11.

Install the 3-pin plug of the Communications harness into the J1939 T-

Connector

EC300 Marine Control System Installation Manual #1024168

Twin Disc, Incorporated

Electrical Installation

12.

Remove the 8-pin receptacle from the Multiple Display Adapter harness located near the J9 connector at the EC300 Control.

13.

Remove the locking wedge from the Multiple Display Adapter harness’s plug.

14.

Install the white wire of the Display Power harness into position 2, 7, or

8 of the 8-pin plug of the Multiple Display Adapter harness.

15.

Install the black wire of the Display Power harness into position 4, 5, or

6 of the 8-pin plug of the Multiple Display Adapter harness.

16.

Install a J1939 terminating resistor into the J1939 T-Connector receptacle located at each end of the Twin Disc Display Communications

Harness Assembly.

Note: Terminating resistors must be installed at each end of the

Twin Disc Display Communication Harness Assembly for the communications to work properly.

17.

Repeat steps 1 through 16 for each additional Twin Disc Display.

18.

When all pins have been inserted in the connector body, install the locking wedge into the Multiple Display Adapter harness 8-pin plug.

19.

Install the 8-pin receptacle onto the Multiple Display Adapter harness’s

8-pin plug.

20.

Align the Multiple Display Adapter harness 6-pin connector with the J9 receptacle of the EC300 Control and push it in until it snaps into place.

21.

Secure all harnesses to a supporting structure with clamps or cable ties at 406 mm (16 in.) intervals.

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