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Catalog #70403
Brochure No. 63-0147
©2003 Edelbrock Corporation
Rev. 1/03
3.4
Nitrous Electrical System Installation Procedures
Determine the location of the Relay and Fuse Holder wire harness. Most common installations locate these
components inside the driver’s compartment and close to the fuse panel under the dash. You can also mount the
Relay and Fuse Holder and harness close to the battery. However, these connectors are water-resistant not
waterproof, so care is required when mounting this assembly under the hood of your vehicle.
Wire Schematic Origin and Destination Map
Wire Color
System
Origin
Destination
Terminal Used
Red
Main System Bat.
Relay Harness
Bat. Volt. Signal
Ring
Voltage
Red
Arming Switch
Arming Switch
Underdash
Spade/Wire
Switched 12V
Intercept
Blue
Solenoid Power
Relay Harness
Solenoids #1 & #2
Spade
White
Relay Power
Relay Harness
Arming Switch
Spade
Black
Arming Switch Ground
Arming Switch
Chassis Ground
Spade/Ring
Black
Relay Ground
Relay Harness
Microswitch
Spade
Black
Microswitch Ground
Microswitch
Chassis Ground
Spade/Ring
Black
Solenoid #1 Ground
Solenoid #1
Chassis Ground
Ring
Black
Solenoid #2 Ground
Solenoid #2
Fuel Pressure
Ring
Safety Switch
Black
Fuel Pressure
Fuel Pressure
Chassis Ground
Ring/Ring
Safety Switch Ground
Safety Switch
3.5
Nitrous Relay and Fuse Holder Installation
The wire harness attached to the relay and fuse holder includes 8 feet of color-coded wires to make the electrical
system installation for your Edelbrock Nitrous System as easy as possible. We recommend that you
do not
cut any
lengths of wires from the wire harness or complete the wiring of the nitrous system until all of the mechanical
components are securely mounted in their permanent locations.
Once all of the solenoids and switches are placed, then route the un-cut wires from the harness to each location
allowing enough wire length on each circuit to not interfere with operating linkages, heat sources, brackets, etc.
Pay particular attention to sharp edges along the route of your wire harness as they can chafe the wire and cause
your system to fail.
After you have accounted for the routing of your wires, follow the “Nitrous Electrical System Wiring Diagram” section
and use the Origin and Destination Map as a guide for which electrical connectors are used in each circuit.
Once you have decided the location of the relay and fuse holder, secure them with fasteners (not included with kit)
such as sheet metal screws, bolts and nuts, etc. Allow for some slack in the red wire that connects the relay and
fuse holders together.
When mounting your relay and fuse holder, make sure the mounting surface is strong enough to support servicing
the relay and fuse easy. Also, ensure you allow for some slack in the wire that joins the fuse holder to the relay
mount. This will avoid any potential loss of power due to stress on the wire harness.
The fuse is covered by the fuse mount housing.
The relay for the Performer EFI system is 30 amps, and the fuse is 15 amps.
