Mallory Ignition ACCEL DFI 6A Electronic Ignition Control Module for Distributor Equipped Engines 75606 - Manual (Page 4)

4 www.accel-dfi.com ACCEL/DFI TECHNICAL SUPPORT 248.380.2780
GM 1973-83 WITH DELCOTRON ALTERNATORS
GM Delcotron alternators use an internal voltage regulator. Install the
diode inline on the smallest wire exiting the alternator (see Figure 5).
It is usually a brown wire.
Most other applications: To eliminate run-on, place a resistor in-line
to the small red/white wire to keep voltage from leaking into the Ignition
Control Module.
MISSES AND INTERMITTENT PROBLEMS
Experience has shown that if your engine is misfiring or hesitating at
higher RPM, it is usually not an ignition problem. Most common causes
include a coil or plug wire failure, arcing from the cap or boot plug to
ground or spark ionization inside the cap. Perform the following checks:
• Inspect the plug wires at the cap and at the spark plug for a tight
connection. Visually inspect for cuts, abrasions, or burns.
• Inspect the primary coil wire connections. Because the Ignition Control
Module receives a direct 12 volt source from the battery, there will not
be any voltage at the coil positive (+) terminal, even with the key
turned on.
WARNING: During cranking, or while the engine is running,
very high voltage will be present and no test equipment should be
connected. WARNING: Do not touch the coil terminals during cranking
or while the engine is running.
• Make sure that the battery is fully charged and the connections
are clean and tight. If you are not running an alternator, this is an
imperative check. If the battery voltage drops below 10 volts during
a race, the Ignition Control Module output voltage will drop.
• Is the engine running lean? Inspect the spark plugs and the entire
fuel system.
• Check all wiring connections for corrosion or damage. Remember
to use proper connections followed by soldering, then seal the
connections completely.
Early Ford and GM: To solve the run-on problem, a diode is supplied
with the Ignition Control. By installing this diode in-line of the wire that
goes to the charging indicator, the voltage is blocked from entering the
Ignition Control Module. Figure 4 shows the proper diode installation for
early Ford and GM vehicles.
NOTE: Diodes are used to allow voltage to flow only one way. Make sure
the diode is installed facing the proper direction, as shown in Figure 4.
Ford: Install the diode inline to the wire going to the #1 terminal.
GM: Install the diode inline to the wire going to the #4 terminal.
CHECKING FOR SPARK
If Triggering the Ignition with the Dark Blue Wire: (See Figure 6)
1. Make sure the ignition switch is in the "OFF" position.
2. Remove the coil wire from the distributor cap and set the terminal
approximately 1/4" from ground.
3. Disconnect the Ignition Control Module white wire from the
distributor’s points or ignition amplifier.
4. Turn the ignition to the "ON" position. Do not crank the engine.
5. Tap the dark blue wire to ground several times. Each time you pull
the wire from ground, a spark should jump from the coil wire to
ground. If spark is present, the ignition is working properly. If there is
no spark, skip to Step 6 on next page.
FOR EARLY GM VEHICLES
ATTACH DIODE TO
#4 TERMINAL FOR FORD VEHICLES
ATTACH DIODE TO
#1 TERMINAL
1A-100V DIODE
TO CHARGING LIGHT
SPLICE HERE
DELCOTRON
ALTERNATOR
1A-100V DIODE
TO CHARGING LIGHT
SPLICE HERE
FIGURE 4
FIGURE 5
TACHOMETER COMPATIBILITY LIST
Aftermarket White Wire Magnetic Trigger
Tachometer Trigger Connector
Autogage Mallory 29074 Mallory 29078
Autometer — —
Ford Motorsport — —
Moroso — —
Stewart Mallory 29074 Mallory 29078
S.W. & Bi Torx — —
Sun Mallory 29074 Mallory 29078
VDO Mallory 8910 Mallory 29078
AMC (Jeep) Mallory 29074 Mallory 29078
Chrysler Mallory 29074 Mallory 29078
Ford (Before 1976) Mallory 29074 Mallory 29078
Ford (After 1976) Mallory 29074 Mallory 29078
GM Bypass in-line Bypass in-line
filter filter
Imports Mallory 29074 Mallory 29078
TO GROUND
WHITE
WIRE
FIGURE 6
DARK
BLUE