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Catalog Part #70402
Brochure No. 63-0164
©2003 Edelbrock Corporation
Rev. 02/03
Page 21 of 25
3.9 Fuel Booster Pump Electrical System Installation Procedures
Determine the location of the Fuel Booster 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 or in the trunk compartment. However, these connectors
are water-resistant, not water-proof, so care is required when mounting this assembly under the hood of your
vehicle.
Wire Schematic Origin and Destination Map
3.10 Fuel Booster Pump 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 you 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.
Use the wiring schematic on the previous page along with the Origin and Destination Map above to determine the
proper routing for the wires and their locations. Take caution as 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.
Locate the fuel pump wires, which are located just above the fuel tank, feeding in towards the in-tank pump.
Locate the wire that should be spliced into for the white trigger wire on the fuel booster pump relay. You will need
to splice the white wire in line with the correct wire leading towards the fuel pump.
For model years 1998-1993,
the correct wire is pink and blank. For model year 1994-1998, the correct wire is brown and pink. Use the
supplied wire splice to intersect this wire.
Once all components have been securely mounted decide 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 holder together.
When mounting your relay and fuse holder, make sure the mounting surface is strong enough to support servicing
the relay and fuse. 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. Be sure to cover the fuse with the
fuse mount housing.
Wire Color System Origin Destination Terminal Used
Red Main Booster Relay Harmess Bat. Volt. Signal 3/8” Ring
Pump Bat. Voltage
Blue Fuel Pump Power Relay Harness Fuel Booster Pump #8 Ring
Black Fuel Pump Ground Fuel Booster Pump Chassis Ground #8 Ring / 3/8” Ring
White Relay Power Relay Harness Fuel Pump Wire Splice Conn.
Black Relay Ground Relay Harness Chassis Ground 3/8” Ring