Chevrolet Performance 19303139 Instrucciones De Instalación página 8

• Two cooling fans can be controlled by the ECM. Control is set to turn on a the first 12 V fan at 97 Deg C (207 Deg F) coolant
temperature and the second at 105 Deg C (221 Deg F). The fan control wires are fused/relayed and must be connected directly
to your fans.
• The fuel pump is controlled by the FPPM from data provided by the ECM. The control wires supply a pulse width modulated
(PWM) 12 V and is fused/relayed and should connect directly to the 12 V side of the fuel pump.
• The gray fuel pump wire is fuel pump control, or positive. The Yellow with Black stripe wire is the ground or reference. The
solid thin Black wire is for shielding and should be attached to the fuel pump shielding pin. If no shielding pin is present, leave
this wire unterminated (blunt cut) and taped to the harness. Chevrolet Performance pump P/N 19303293 does NOT have a
shielding pin.
• A tachometer signal is included in the bulkhead connector (see below). This is a 4 pulse/rev output which may correspond
to a 8-cylinder setup in some tachometers or transmission controllers. Note the signal is a low voltage square wave, most
tachometers or transmission controllers will require 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 - Tach 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.
• 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
Load View or Rear View
Circuit # Position
2501B A
- B
C_121 C
C_818 D
- E
- F
2500B G
331B H
- J
C_IGN K
C_IGN L
C_IGN M
LT1 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.
Ignition Voltage
15326849 Connector
12191818 Female Terminal
15366021 Seal
15305171 Plug
15430903 TPA
15317832 CPA
Wire Gage Color
0.5 White
- Plug
0.75 White
0.75 Brown
- Plug
- Plug
0.5 Lt Blue
0.5 Yellow/Brown
- Plug
1.0 Orange
0.75 Pink
1.0 Black
Mating connector
15326854 Connector
15304701 Male Terminal
15366021 Seal
15305171 Plug
15430903 TPA
Description
GMLAN Low Speed (-)
Empty
Engine Speed
Vehicle Speed - Out
Empty
Empty
GMLAN Low Speed (+)
Oil Pressure Signal
Empty
Battery Power Fuse
Ignition "On" Power
Gound
19303139
REV 02JN16
PART NO.
DATE
Previous Revisions are Archived
02JN16 Revision - Blake Nye
Pull High Tach Out
8
SHEET
REVISION
39
OF
AUTH
N/A