Haltech E8 - Manual (Page 10)

Haltech E11/E8 Instruction Manual
wires labelled “injector output” from the ECU providing the ground to switch the injector on and allow the
fuel to flow).
Connect your fuel pump back to the fuel pump relay.
Run the loom from all ignition outputs to ignition modules (often called ignitors or spark amplifiers) but
leave the ignition modules disconnected at this stage. See warning at beginning of manual. Connect
ignition modules to coils and run wiring for coil(s) power supply back to the relay.
Connect idle control motors if applicable.
Connect any other auxiliary devices such as thermo-fans or turbo wastegate solenoids.
Power & Ground:
Connect all ground connections to a central location, any unused black wires in the wire harness can be
grounded.
Connect power from the battery to the fuse block. Try to keep the wires from the battery to fuse block short
and ensure that this run of wire is well protected from damage to its insulation in case of a short circuit.
Connect power from the fuse block to each relay that supplies power to injectors, ignition, ECU and any
other auxiliary devices that require a switch 12V supply.
Ensure that the ignition modules and fuel injectors are disconnected at this stage.
Connect the ECU to the loom and connect a laptop computer to the D9 serial connector. Proceed to the
Setup Guide.
Page: 10 Copyright © Haltech 2008
IMPORTANT INSTALLATION NOTE !!
To avoid damage to ignition components, never connect the ignition modules
to the ECU until the ECU is configured. The same applies to the Fuel System,
never connect fuel injectors until the ECU is configured, otherwise the engine
may flood with fuel.
When wiring a Haltech ECU, it's extremely important that you have good
connections to the vehicle's electrical ground and battery power. If possible,
supply power to the fuel injectors, ECU and ignition system directly from the
positive terminal of the 12V Battery (via relays). Don't just look for any wire
that has 12 volts while the ignition is on, and assume that's good enough.
Trying to get power from unknown wires causes many problems and makes it
very hard to diagnose a fault. That wire may have a large voltage drop, or be
picking up electrical noise which can interfere with the ECU. Avoid running
wires next to starter motor cables or ignition coils and their wiring, including
high tension Leads. Also keep the ECU's wiring away from the antenna cables
of radio transmitting equipment (e.g. CB, UHF radios) and cables from high
powered car audio systems. All can cause ECU malfunctions.
When crimping cables, use a good crimp tool. After crimping each connector,
pull on the cable and connector and make sure that it doesn't come loose. If
you're soldering connections, make sure that you have a large enough
soldering iron to ensure that the joint gets hot enough and allows a good flow
of solder onto the wires. Some cheap or faulty irons just barely melt the
solder, which only sticks to the wire instead of making a good solder
connection. Properly insulate all connections.