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•
A cooling fan is controlled by the ECM. Control is set to turn on a 12 V fan at 95 Deg C (203 Deg F) coolant temperature.
The fan control wire is fused/relayed and must be connected directly to your fan. NOTE: The fan won't turn off until the
vehicle reaches 15 mph.
•
The fuel pump is controlled by the ECM. The control wire supplies 12 V and is fused/relayed and should connect to the 12
V side of the fuel pump.
•
A tachometer signal is included in the bulkhead connector (see below). This is a 2 pulse/rev output which may correspond
to a 4-cylinder setup in some tachometers or transmission controllers. Note the signal is a low voltage square wave, some
tachometers or transmission controllers may need a pull-up resistor in order to read the signal, similar to a 5000 ohm, ¼ watt
resistor– this detail is left to the user. The following circuit has worked for numerous devices – the resister value may need
to be changed if your device does not read this output properly.
Bulkhead Connector Pin C
Engine Speed - Tech Out
Bulkhead Connector Pin L
NOTE: When connected to the Chevrolet Performance Supermatic Connect and Cruise Harness the pull up resister
is not required for the Transmission Controller.
•
An oil pressure output is included in the bulkhead connector and can be used for a pressure gauge if desired (see below for
scaling). The oil pressure sensor is required for the system to operate properly.
•
A vehicle speed output is included in the bulkhead connector for use with auto-scaling speedometers. The vehicle speed
sensor connector in the harness must be attached to a variable reluctance type speed sensor (typical of most late model
GM automatic transmissions) for this to function.
Bulkhead Connector Outputs
Bulk Head Connector
A
B
C
D
G
H
J
K
Load View or Rear View
Circuit
Position Wire Gauge
#
2501A
A
-
B
121
C
818
D
432B
E
-
F
2500A
G
331B
H
486B
J
40F
K
5292
L
50B
M
LS9 Crate Engine Control System
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
5000Ω
Ignition Voltage
15326849 Connector
12191818 Female Terminal
15366021 Seal
E
F
15305171 Plug
L
M
15430903 TPA
15317832 CPA
Color
22
Tan
-
Plug
22
White
22
Brown
22
Lt. Green
-
Plug
22
Tan/Black
22
Tan/White
22
Purple
18
Orange
18
Pink
18
Black
Mating Connector
15326854 Connector
15304701 Male Terminal
15366021 Seal
15305171 Plug
15430903 TPA
Description
GMLAN High Speed (-)
empty
Engine Speed
Vehicle Speed - Out
MAP Signal
empty
GMLAN High Speed (+)
Oil Pressure Signal
Throttle Pos #2 (0.5v - 4.5v)
Battery Power Fuse
Ignition "On" Power
Ground
IR 27MY16
PART NO.
DATE
Pull High Tach Out
19299465
SHEET
REVISION
7
40
OF
AUTH
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