Mallory Ignition ACCEL Digital Fuel Injection Engine Management System 74030 - Manual (Page 9)

7
ACCEL/DFI
• Oxygen (3-pin female black connector)
• Injector (5-pin round white connector)
• Tach pick-up (1-pin brown connector)
• Fuel pump (bare lead, red wire with white stripe)
• IAC (4-pin square male black connector)
Connect each to the appropriate sensor using the diagram
at the end of this section. If you need to lengthen the fuel
pump wire to reach your fuel pump, make sure to use at
least 14 gauge wire, soldering and heat shrinking the
connection between the two wires. Finally be sure to
connect both the positive and ground terminals on the main
wiring harness DIRECTLY to the battery. If you fail to do
this, intermittent and unusual problems may occur.
NOTE: If you are controlling timing with the ACCEL DFI
ECM (using a computer-controlled ignition system, TFI,
etc.) the Tach pick-up will not be used. If you connect the
Tach pick-up and the computer-controlled ignition connector
at the same time, your ACCEL DFI ECM will cancel them
both out resulting in a no spark (no RPM signal) situation.
In many cases this will also damage your ECM.
At this time you can connect your User Interface Module
(UIM, or Power Tuner) to the MWH by connecting the
6-way connector (located near the ECM connectors) to the
6-way connector on the UIM. If you did not order a UIM
there is nothing for you to do with the 6-way connector on
the MWH. If using a UIM mount the unit with two (2) #8
sheet metal screws or 20 pan head screws with nuts, in a
location convenient to the driver.