Haltech F9A - Manual (Page 94)

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5.6 Shift Light Illumination (SL)
The F9A can be used to activate a shift light or a piezo buzzer when engine speed exceeds the
programmed activation speed.
To use the shift light function, you will need the following:
- the F9A secondary harness incorporating the Auxiliary I/O connector;
- a dashboard lamp or buzzer;
- F9 programming software and cable.
The lamp or buzzer should be wired to +12V on one side, and the other to the ECU. The lamp
used must not draw more than 0.5 amp of current (i.e. a 6 Watt globe). Alternatively, a high
intensity LED may be used. If so, use a series resistor of 330 ohms to limit the current
through the LED to around 40mA.
Once the wiring has been installed, run the F9 programming software and go to the Options
page. Select the Shift Light function on the appropriate output and set the value as desired.
5.7 Auxiliary Fuel Pump (AP)
Running two fuels pumps continuously, or else a single very large flow-rate pump (if one is
available) means excessive noise and heating of the fuel. A street vehicle with very high
potential output will not need a large fuel supply at all times. The second pump would only be
activated when load demands require that the extra flow be available.
NB: The extra fuel pump cannot be driven directly by the ECU. The ECU can be made to
drive a relay to power the pump.
To use the Auxiliary Fuel Pump function, you must have the following:
- the F9A secondary harness incorporating the Auxiliary I/O connector;
- a properly plumbed fuel pump, wired through a relay;
- F9 programming software and cable.
The extra pump must be connected in parallel with the primary fuel pump. Figure 5.6
suggests a possible layout. The check valve is necessary to prevent fuel from being forced in
the wrong direction. Connect the power to the pump via a relay as shown. Either the positive
or negative side may be switched through the relay.
Run the F9 programming software Online and select the Auxiliary Fuel Pump function on the
appropriate output. There are two parameters that define when the Auxiliary Pump will be
switched on.
Load Bar: This is the bar number on the fuel maps which must be exceeded for the extra
fuel pump to be switched on. If you wish to switch the extra fuel pump only by engine speed,
set this to 32.