Haltech E6K - Manual (Page 24)

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1.3.6. Mount Optional Exhaust Gas Oxygen Sensor
The optional exhaust gas oxygen sensor must be mounted in the exhaust pipe near the exhaust
header or extractors, usually after the collector. The sensor uses the exhaust gas to detect if
the engine is lean or rich. Many late model engines already have provision for an exhaust gas
oxygen sensor and the sensor provided should fit any standard exhaust mount. Some exhaust
systems have the sensor mount up to around half a meter (2 feet) down stream from the
exhaust headers.
If the exhaust system does not have an existing sensor mount then a new mount will have to
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.
1.3.7. 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.
WARNING:
DO NOT ALLOW THE HARNESS TO TOUCH HOT EXHAUST
PARTS INCLUDING MANIFOLDS 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.
1.3.8. Power Relays
There are two relays used with the Haltech E6K, the Main 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.