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Most earlier GM V8 electronic fuel injection (EFI) engine applications including L98, LT1 and LT4 engines:
•
Connect white Tachometer Input Signal wire to PCM/ECM tachometer output -- see page 15 for tachometer signal wire
information.
•
For analog input, connect the purple analog input wire to the Throttle Position Sensor, Clutch Pedal Position sensor, or
MAP sensor.
• 4500
RPM window switch example with 200 RPM hysteresis, analog input enabled, and tachometer pull-up resistor
disabled.
o
Sixteen position Input Signal Pulse Per Revolution switch set to Low Range and 4 pulses per revolution
o
RPM #1 programming switch for thousands of RPM (X000) on position 4
o
RPM #1 programming switch for hundreds of RPM (0X00) on position 5
○
Combination of DIP switches 1-3 set hysteresis of 200 RPM
• DIP switch #1 flipped down (OFF)
• DIP switch #2 flipped down (OFF)
• DIP switch #3 flipped up (ON)
○
DIP switch #4 (Analog input activation) flipped up (ON) -- only if connected to an analog input
○
DIP switch #5 (Tachometer pull-up resistor activation) flipped down (OFF)
• 1800-
7200 RPM window switch example with 200 RPM hysteresis, analog input enabled, and tachometer pull-up
resistor disabled.
o
Sixteen position Input Signal Pulse Per Revolution switch set to Low Range and 4 pulses per revolution
o
RPM #1 programming switch for thousands of RPM (X000) on position 1
o
RPM #1 programming switch for hundreds of RPM (0X00) on position 8
o
RPM #2 programming switch for thousands of RPM (X000) on position 7
o
RPM #2 programming switch for hundreds of RPM (0X00) on position 2
○
Combination of DIP switches 1-3 set hysteresis of 200 RPM
• DIP switch #1 flipped down (OFF)
• DIP switch #2 flipped down (OFF)
• DIP switch #3 flipped up (ON)
○
DIP switch #4 (Analog input activation) flipped up (ON) -- only if connected to an analog input
○
DIP switch #5 (Tachometer pull-up resistor activation) flipped down (OFF)
