5
+
Figure 3
6. Mount relay on firewall of engine compartment using a sheet metal screw.
WARNING! Before punching or drilling a hole in the firewall, make sure you know what is on the other side to avoid puncturing equipment
such as heater cores, air-conditioning system equipment, hoses, or wiring.
7. Plug the fuel pump relay harness into the relay, until it locks into place.
8. Connect the black wire of the relay harness to a good clean ground using 12 gauge wire.
9. Connect the Green/Black wire of the relay harness to the terminal marked “C” on the oil pressure safety switch.
10. Connect one of the red wires of the relay harness to the positive wire (red wire) of the fuel pump.
11. Connect the black wire of the fuel pump to a good clean chassis ground using a ring terminal
12. Attach the in-line fuse holder to the remaining red wire of the relay harness. After attaching the fuse holder, insert a 25A fuse and connect to the
positive side of the battery using 12 gauge wire.
13. Connect the terminal marked “NO” of the safety switch to a switched 12V source.
14. Connect the terminal marked “NC” of the safety switch to the starter terminal that’s hot (12V) during cranking only.
15. Reconnect the battery cables.
SERVICE PARTS AND ACCESSORIES:
ITEM
PART NUMBER
Chevy Small Block Mechanical Pump Block-Off Plate
12-814
Chevy Big Block Mechanical Pump Block-Off Plate
12-813
0-15 PSI Fuel Pressure Gauge (non-liquid filled) 1-1/2” Dia. 1/8” NPT
26-500
0-30 PSI Fuel Pressure Gauge (non-liquid filled) 1-1/2” Dia. 1/8” NPT
26-502
0-15 PSI Electric Fuel Pressure Gauge (dash mount)
26-503
0-15 PSI Fuel Pressure Gauge (liquid filled) 1-1/2” Dia. 1/8” NPT
26-504
0-30 PSI Fuel Pressure Gauge (liquid filled) 1-1/2” Dia. 1/8” NPT
26-505
30AMP Fuel Pump Relay Kit
12-753
90
Elbow for Attachment to Holley Fuel Line
26-69
Safety Shut Off Switch
12-810
