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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.