FIGURE 6.22 Passenger Side Coil Connector
FIGURE 6.23 ECT Sensor
Locate the tail section that you earlier separated from the engine group. Begin routing it
towards the rear of the vehicle. Be sure to avoid all sharp edges, moving or hot parts, or
anything else that may damage the harness.
If you ARE using a manual transmission, tape-up the 13-position connectors labeled TRANS,
PNP (2) and store them in the harness.
A.
BACK-UP (optional)-This circuit is used to power the back-up lamps. This wire will
connect directly to the back-up light socket. You will need to splice a wire into this
circuit in order to accommodate two back-up lights.
B.
FROM START SWITCH (optional)-This circuit is used to connect the start switch to
the neutral safety switch (omit this circuit if using anything other than an electronic
automatic transmission). Connect this wire to a circuit from the ignition switch start
position. This wire should only have power in the start position.
C.
FUEL PUMP (mandatory) - This circuit provides power to the electric fuel pump.
Connect this wire to the positive side of the electric fuel pump.
This wire only has
power for a few seconds when the ignition switch is turned on. It will have
constant power while the engine is cranking/ running.
D.
INPUT SPEED SEN (optional) (not equipped on all models) – This connection is
only used on the 4L80E/ 4L85E transmissions. This will rarely be used and can be
stowed if not needed.
E.
OUTPUT SPEED SEN (optional) – The Vehicle Speed Sensor (VSS) is a pulse
counter type input that informs the PCM how fast the vehicle is traveling. The VSS
system uses an inductive sensor, mounted in the tail housing of the transmission, and a
toothed reluctor wheel on the tail shaft. The teeth of the reluctor wheel alternately
interfere with the magnetic field of the sensor creating an induced voltage pulse as the
reluctor rotates.
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