Dakota Digital 3 operation manual Fuel SND, Cruise, Wait +

FUEL SND

The fuel gauge sending unit is not normally supplied because the display system can use the existing fuel sending unit that is already in the tank in many cases. The sending units that are compatible with this system are as follows: GM, Ford, VDO, and Stewart Warner. It is also possible to program in a custom setting for senders that are not pre-programmed into the system.

Dakota Digital recommends that you run two wires back to the fuel level sensor to insure proper grounds. Use the FUEL - and FUEL SND terminals and run a twisted pair of wires back to your fuel level sensor. Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to insure the sensor is sufficiently grounded. The other wire is the sensor signal which goes to the FUEL SND terminal.

If your wiring harness already has a single wire routed through the vehicle for the fuel sender then it may be used. If using a wire from an existing harness, make sure that the wire does not have power. The fuel sender gets power from the control box only. Fuel senders reference their ground from the sender mounting plate. Make sure that a ground wire is connected from one of the sender mounting bolts to the vehicle frame.

The fuel sender type is selected using the setup menu under “FUEL”. The settings are discussed later in the setup section. Anytime the fuel level is below 10%, the reading will flash as a warning of low fuel.

The fuel gauge will initially display “FL” until the fuel sender type has been set. If the fuel display shows “ --” this indicates that the control box is sensing a short to ground or out-of- range error from the sender or sender wire. If the fuel display shows “EE” this indicates that the control box is sensing an open circuit or out-of-range error from the sender. If either indication remains on the display, inspect the sender wire for damage, check the routing of the sender wire, check the sending unit grounding, and check that the sender selection is set correctly for the sending unit that is connected.

FUEL –

This terminal is used to provide a ground connection for the fuel level sensor. Dakota Digital recommends that you use the FUEL - terminal and run a twisted pair of wires back to your fuel level sensor. Connect the FUEL - terminal to the fuel level sensor body or a mounting screw to insure the sensor is sufficiently grounded. One terminal on the sensor is the signal which goes to the FUEL SND terminal

***For fuel level sensors that are attached to an electric fuel pump, or if you have an electric fuel pump in the tank, make sure that the fuel pump is externally grounded to the vehicle chassis. Attempting to ground the fuel pump to the Dakota Digital control box will result in erratic operation and damage to the control box.

CRUISE (-)

The CRUISE terminal can be used as a “cruise engaged” indicator. The CRUISE input is activated by a ground signal from a compatible cruise control harness. Whenever the CRUISE input is grounded, the system will display a small “c” to the right of the speedometer.

WAIT (+)

The WAIT terminal can be used as a “wait to start” or glow plug indicator. The WAIT input is activated by a 12 volt signal from the glow plugs. Whenever the WAIT input is powered, +12V, the system will display “WAIT” on the tach message display. This message can be cleared by pressing and holding switch 2, or once the WAIT terminal loses the +12V signal.

13 MAN 650066:D