Nitrous Express ELECTRONIC FUEL INJECTED LS PLATE SYSTEM - Manual (Page 5)

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ELECTRICAL HOOK-UP:
1. Mount the toggle (Arming) switch in a location that is within easy reach of and in plain sight of the
driver.
2. Using 18-ga, blue wire and connectors supplied in the switch kit, connect a HOT lead (12 VDC
POSITIVE) to the “Power” terminal of the toggle switch. (Use 5 amp inline fuse if desired). This
power source must be controlled by the ignition switch (See wiring Schematic).
3. Connect a grounded wire to the “Ground” terminal of the toggle.
4. The system is furnished with a universal wide-open throttle switch. This WOT micro-switch is
designed to work with the furnished universal mounting bracket. Its maximum capacity is 10 AMPS
and should only be used to activate low amp draw accessories or in conjunction with the supplied
relay.
A. Assemble the micro-switch on the mounting brack
et using the supplied 3⁄4” 4-40 bolts and nuts.
The switch can be mounted in several different configurations, select the position you require and
tighten the bolts. Do not over-tighten; the plastic micro switch can be damaged.
B. The activation arm on the micro-switch is extra long. This allows you to twist, bend, or cut it to aid
in the ease of installation.
C. The mounting bracket is made of easily bendable material and may be formed to any configuration
that will allow it to place the WOT switch in the proper location. Be sure the WOT switch is only
activated at wide open throttle.
5. Attach a 18-ga, jumper wire from the remaining terminal “ACC” of the master arming switch to one
of the terminals on the wide open throttle switch.
6. Using the blue 18-ga. wire supplied with the system, connect the remaining wide-open throttle terminal
to the “Red” wire on the supplied heavy duty relay. (See wiring diagram).
7. Use the red 12-ga. wire to connect the “BAT” terminal of the alternator or to the + post on the vehicle
battery, to the “Black” wire on the heavy duty relay. (If desired a 40 amp fuse may be installed here)
8. Attach one wire from each of the Fuel and Nitrous solenoids to the “Green” wire on the relay. Note:
These coils are direct current and it does not matter which wire is used. Now attach the two remaining
solenoid wires to a good ground source.
9. Attach the “White” wire from the relay to the fuel safety switch (PN 15118 optional) terminal marked
NO. Using the 18-ga. blue wire, attach the other terminal on the safety switch marked (C) to ground.
(See wiring Schematic) Note: If a fuel safety switch is not used simply attach the “White” wire on the
relay to ground.
10. Reconnect the negative battery cable.
11. At this point both solenoids should be tested for proper operation. Note: (Be sure the nitrous bottle is
off and there is no pressure in the N2O supply line). If you are using a fuel safety pressure switch you
must use a jumper wire between the NO and C terminals when testing the solenoids. To test, turn the
“arming” toggle switch to the ON position and push the “activating” wide-open throttle switch. A
clicking sound should be heard as the solenoids open. IMPORTANT: Make sure that both of the
solenoids are clicking! If no sound is heard or only one of the solenoids is working, check all wire
connections and the wiring schematic for proper connections.
12. With all components mounted and all hose and electrical connections made under the hood connect
the feed line to the nitrous bottle and slowly open the valve listening for leaks. When it is confirmed
that there are no nitrous leaks activate the fuel pump and check for fuel leaks. With the pump running
gently break the connection between the hose from the fuel rail to the fuel solenoid to bleed any
trapped air out of this line. IMPORTANT NOTE: Before continuing be sure no raw nitrous has been
injected into the engine during testing of the electrical system. If ANY nitrous was accidently injected
you must disconnect the coil wire(s) and rotate the engine with the starter motor for at least 10