628 datasheet(2/12 Pages) MALLORY

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WIRING PROCEDURE

Step 1

Connect the BLACK WIRE to engine or chassis ground. You can use the supplied “U” shaped terminal and #6 x

1⁄4" sheet metal screws to make this connection. If you are connecting the RPM Activated Switch to an after-

market ignition system such as a Mallory HYFIRE®, use the same grounding location that the ignition uses. See

Figures 4-9, pages 7-12.

Step 2

Connect the RED WIRE to a 12-volt power supply, such as the ignition switch. You can use the same wire that

provides power for your ignition as long as a ballast resistor is not wired in series with it.

NOTE: Do NOT con-

nect the RED WIRE to the coil (+) terminal. Connect it to the wire coming directly from the ignition switch. If

your vehicle is equipped with loom resistance wire, you must provide an alternate power connection to the

red wire.

Step 3

The GREEN WIRE must be connected to the ignition system tach output.

• When using a Mallory ignition system, connect the GREEN WIRE to the TACH terminal. See Figures 2, 3

and 4.

• When using an aftermarket ignition with a TACH output, connect the GREEN WIRE to the TACH terminal.

Check manufacture’s ignition instructions to find this location.

• Other aftermarket ignitions - Connect the GREEN WIRE to the tachometer lead terminal. Check manufac-

turer’s ignition instructions to find this location.

Step 4

To connect a device that you want to switch ON at the RPM setting you’ve selected, such as a shift light, connect

one ORANGE WIRE to the device and the other ORANGE WIRE to a 12-volt power supply. Connect the remain-

ing wire from the device to a ground. See Figure 5, page 8.

Step 5

To connect a device that you want to switch OFF at the RPM setting you’ve selected, such as a nitrous solenoid,

connect one PURPLE WIRE to the device and the other PURPLE WIRE to a 12-volt power supply. Connect the

remaining wire from the device to a ground. See Figure 6, page 9.

Step 6

Secure all wires to prevent contact with extreme heat, sharp objects, or moving devices, such as fans, belts, and

linkages.

Step 7

Recheck all wires and connections to ensure that they are correct before applying power.

Step 8

Reconnect the battery (–) terminal cable. Start engine and check operation of the RPM Activated Switch.

628 датащи(PDF) 2 Page - Mallory performance club