Toggle switch for efi fuel pump?

[koosh]

Been researching possibilities fir installing a toggle switch on the power wire going to an in tank fuel pump with a car that has efi.
Some results say: just install a 20 ano on/off toggle, others say the switch should be installed with a relay because of the possible high amp draw?
Manufacturer says my pump averages between 16-18 amps, but “could” go higher depending on “other electrical items” whatever that means…
I was thinking of using a high amp rated battery shut off switch?

 

[matthon]

Depends on the efi system, iirc.
My FiTech controls the in-tank pump, has a wire from the ecu specifically for it.

 

[RemCharger]

A buddy of mine on a 70 charger, used the defrost switch to power the pump. It is a low pressure carb FP though..

 

[gkent]

A relay is always a smart idea. A fuse between the relay and the pump. Trigger the relay with ground - that way you don't have 12 volts running through the switch.

 

[gkent]

I was thinking of using a high amp rated battery shut off switch?

WAY overkill !!!

 

[furious70]

Always a relay and the switch goes in the signal to the relay not the main power wire.

 

[furious70]

I'll add I've considered an interia switch too like OEM and I really should have one, everyone should

 

[matthon]

Prior generations of FiTech had the relay built into the ecu with a fuse.
No need for external relay.