Nitrous Express Water Methanol Stage 1 - Manual (Page 4)

Installation - Electrical
Required tools
- Drill
- Screw Driver – Cross Tip
- Wire Cutter/Stripper/Crimper
- Please refer to electrical diagram.
Step 1 Pressure Switch
Mount the pressure switch using a tie wrap. Hard mounting using screws is not recommended as diaphragm
distortion could cause the switch to malfunction.
Attach 1/8” silicone tubing (supplied) to hose barb on switch. Other end of the hose attaches to manifold boost
source. Wire switch according to wiring diagram.
Step 2 LED
Select location of LED (green-on when pump activated) in driver’s compartment of vehicle. Run RED and BLACK
wires to LED and make required connections as indicated in wiring diagram. Note that the RED wire immediately
next to the GREEN wire is used for the LED, not the RED wire on the opposite side of the relay harness from the
GREEN wire. The WHITE wire of the LED connects to ground, the RED wire of the LED connects to the proper
RED wire.
Step 3 Relay
Mount the relay on fi re wall close to the pressure switch. Wire relay according to diagram using supplied connectors.
Either of the combined GREEN/RED wires can be used to power the pump, injection status LED, or Solenoid
Upgrade. The single RED wire is the switched activation input. It is typically connected to the adjustable pressure
switch, but can also be connected to a nitrous solenoid or other 12V input to control injection.
The boost switch has three prongs.
The prong labeled “NO3”is for 12V
key-on power, and the prong labeled
“COM” connects to the relay’s red
wire. Note that that are two red wires
on the relay harness. The red wire
immediately next to the green wire is
for the LED indicator light. The red
wire with its own dedicated terminal
connects to the boost switch which in
turn connects to 12V key-on power.
NO3 Prong To 12V Key-
On Power
Pump
Low Fluid LED
Injection Status LED
Air Flow
Throttle Plate
+12 Volt Key On
Engine Ground
Wire Connection
Boost Switch
Red
Red
20A Fuse
White
Black
Black
Yellow
Boost Line To Engine
Boost Source
Green
Red Wire To
COM Prong
Black
Black
To Battery Positive (+)
Level Switch
Red