646 Datasheet, PDF (3/8 Pages) Littelfuse – MINIATURE FUSEHOLDERS

075
To tachometer
Connect ignition coil and distributor/trigger
wires according to the HYFIRE^Æ VII instructions
applicable to the distributor/trigger being used
BLACK
FIGURE 3
RPM ACTIVATED SWITCH WITH HYFIRE^® VII
DO NOT connect to coil (+) terminal
RED
DO NOT connect to coil (+) terminal.
Connect this wire to a switched 12 volt
source. Switch must be capable of
switching all of the current from the
ignition and device(s).
The ignition may draw up to 1/2 amp.
Minimum of 18GA wire should be used.
P/N 646
MODE
VALUE
L ñ LOW RPM
H ñ HIGH RPM
C ñ CYLINDER SELECT
MODE
WINDOW RPM SWITCH
UP
DOWN
®
BLACK
ORANGE WIRES ñ
Connect to a device to be turned
ON at a selected RPM.
PURPLE WIRES ñ
Connect to a device to be turned OFF at a
selected RPM. NOTE: Relays are required if
device being switched draws more than 5 amps.
To engine block or
chassis ground
FIGURE 4
075
RPM ACTIVATED SWITCH AND
RELAYS WITH HYFIRE^® VII
Connect ignition coil and distributor/trigger wires
according to the HYFIRE^Æ VII instructions applicable to
the distributor/trigger being used
GREEN
To tachometer
These relays are shown as examples
only. Other relays may be used, such
as Blue Streak Part No. RY-48
DO NOT connect to COIL (+) terminal
RED
STANDARD
STANDARD
Connect this wire to a device to be
turned OFF at a selected RPM.
Connect the other wire from the device to
GROUND. NOTE: Relays are required if the
device being switch requires more than 5 amps.
Connect this wire to a device to be
turned ON at a selected RPM.
Connect the other wire from the device to
GROUND. NOTE: Relays are required if the
device being switch requires more than 5 amps.
PURPLE
To engine block or chassis ground
ORANGE
To engine block or chassis ground
DO NOT connect these wires to COIL (+) terminal
Connect these wires to a switched 12 volt source.
Switch must be capable of switching all of the
current from the ignition and devices.
BLACK
To engine block or chassis ground
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