Haltech E6S - Manual (Page 25)

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1.3.10. Electronic Control Unit (ECU)
The Haltech E6S is not designed to be waterproof. It is desirable that the ECU be given as
much protection from the environment as possible. It is recommended that the ECU be
mounted inside the passenger compartment, either on the firewall, under the dashboard or
under the passenger seat.
The ECU has four mounting holes that allow it to be mounted to most flat surfaces. In
extreme cases of vibration, the ECU should be mounted on rubber anti-vibration pads. When
mounting the ECU remember that the communications connector on the loom should remain
accessible for ease of programming.
1.3.11. Flying Leads
Locate and connect the following flying leads.
Black - (Ground) Locate a good chassis ground point and connect the black wire. The best
spot is direct to the battery negative terminal.
Red - (Supply 12V) Locate a source of continuous 12 volts and connect the red wire.
Connecting direct to the positive battery terminal is suggested.
Grey - (Switched 12V) The grey wire is used to control the operation of the Haltech E6S
power relay. It needs to be connected so that it sees 12V only when the ignition is on
and during cranking. This wire does not draw a large amount of current (< 0.5A). Do
not connect to the accessory outputs of the ignition switch.
Orange - The two orange wires are used to operate the fuel pump. When the Haltech E6S
ECU wants to operate the fuel pump it will close the fuel pump relay connecting the
two orange wires together. The diagrams show two examples of wiring the fuel pump.
Do not add extra relays to the fuel pump circuit.