Route wiring harness and connect sensors, Power relays – Haltech F10 User Manual

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be welded to the exhaust system.
When routing the electrical connections to the exhaust gas oxygen sensor do not allow the

harness to touch the exhaust pipe as the heat will damage them.
See Chapter 15 [15.3] for more information on exhaust gas oxygen sensors.

1.3.6. Route Wiring Harness and Connect Sensors

Lay the main wiring harness out in the engine bay with the sensors mounted to ascertain the
best fit for the harness. Pass the wiring loom through a hole in the engine bay firewall and
into the passenger compartment where the ECU will be mounted. Either use an existing hole
or cut a new hole to suit. Use a rubber grommet or similar device to protect the harness from

being damaged by rubbing on the sharp edge of the hole.

WARN ING:

DO NOT ALLOW THE HARN ESS TO TOUCH HOT EXHAUST

PARTS INCLUDING MAN IFOLDS OR TURBOCHARGERS.

TRY TO ROUTE THE MAIN HARNESS AWAY FROM HIGH

VOLTAGE IGNITION LEADS. UNDER NO CIRCUMSTANCES RUN

ANY WIRING PARALLEL TO, OR IN CONTACT WITH THE

IGNITION LEADS.

Note: Be neat. Run the harness in a tidy fashion. Try to run the harness along

paths used by original wiring. Use nylon cable ties to secure the harness in

place, but do not stress the wiring or connectors.

Once the harness is fitted, connect all the sensors to their appropriate plugs.

1.3.7. Power Relays

There are two relays used with the Haltech F10, the M ain Power Relay (with a grey wire) and
the Fuel Pump Relay (two orange wires). These relays are identical parts so it is not important

which relay goes in what connector.