WIRE COLOR # OF WIRES LABELED CONNECT TO:
IN CONNECTOR
Gray, Green/White, Black, Orange 4 Fuel Relay Fuel Pump Relay
Green/White - VSS Output Speedometer
White - Tach Tachometer
Pink, Purple - Brake Switch Brake Switch
Pink - Fuse Block Ignition Ignition Power
Green/ White - AC Request Compressor B+
Gray - Fuel Test See Paragraph 6.2.1
Gray, Blue, Gray/Black, Brown - Cruise Control Cruise Control Switch
TABLE 7.1 Dash Section Connections
7.2 ENGINE GROUP INSTALLATIONS
The engine group is designed to be separated into left (driver) and right (passenger)
sections. Each side is tie-wrapped separately, BUT NOT LABELED. The left side of the
has the connectors for the throttle position sensor, mass air flow sensor, and engine
coolant sensor, all of which ARE labeled. When you begin routing, FIRST separate the
engine group into left and right sections, and place them accordingly.
Note: Before you connect any wires, separate the tail section from the engine group
and place it out of the way.
A. ALT- This circuit is used to excite (turn on) the voltage regulator. When using
the stock alternator equipped on the 4.8, 5.3 or 6.0L Vortec engines, this
connector will connect into the voltage regulator plug.
B. CKP- The Crankshaft Position (CKP) sensor provides the PCM with crankshaft
speed and crankshaft position. The PCM utilizes this information in order to
determine if an engine misfire is present. The PCM monitors the CKP sensor for
momentary drop in crankshaft speed in order to determine if a misfire is
occurring. See Figure 7.11
C. CMP- The Camshaft Position (CMP) sensor provides the PCM with camshaft
speed and position. The PCM monitors the CMP sensor for any momentary drops
in camshaft speed in order to determine if a misfire is occurring. See Figure
7.10
D. DRVR. & PASS COIL- The ignition system on this engine is a multiple coil
configuration called “coil on plug”. The ignition coil mounting bracket is attached
to the rocker cover. The secondary ignition, or spark plug, wires are short
compared to a distributor ignition system wire. See Figure 7.17 & 7.18
E. ECT - The (PCM) supplies a 5.0 volt signal to the Engine Coolant Temperature
(ECT) sensor through a resistor in the PCM and measures the voltage. The
voltage is high when the engine is cold. The voltage is low when the engine is
hot. The PCM calculates the engine coolant temperature by measuring the
voltage. The engine coolant temperature affects most systems the PCM controls.
See Figure 7.19
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