Adding Fuel Pump Relay and Cut-Off Switch
If you want to use a toggle switch, that switch will turn your relay on, which will allow power to go to your pump.
If the battery is in the trunk, run a power lead right off the battery with an appropriate sized fuse to the 30 terminal on your relay.
Basic relay wiring
30 is power from battery for your pump
87 is power out to your pump
85 ground
86 on/off toggle switch
You can flip flop 85-86 terminals in most cases unless there is a diode in the switching circuit. Most relays don't have a diode here. This diagram has them flipped.
If you want to use a toggle switch, that switch will turn your relay on, which will allow power to go to your pump.
If the battery is in the trunk, run a power lead right off the battery with an appropriate sized fuse to the 30 terminal on your relay.
Basic relay wiring
30 is power from battery for your pump
87 is power out to your pump
85 ground
86 on/off toggle switch
You can flip flop 85-86 terminals in most cases unless there is a diode in the switching circuit. Most relays don't have a diode here. This diagram has them flipped.