vstol

I am installing a toggle for the electric fuel pump, will a 20 amp switch be enough?

magicv8

Depends on the pump. My Purolator only needs 4 amps.

mikem350

If it is a hi amp draw pump use the switch to activate a relay (with 20A fuse directly to the battery). Then any ole switch can activate the relay AND a full 12V goes to the pump!

It is also not a good idea to run a lot more current thru the ign switch circuit!

vstol

Thanks, the plan is to either take power from the Batt from the maxi fuse or the batt post on the ign switch to the toggle (20 amp) through the relay then the pump.

magicv8

The toggle switch for a relay only needs a 1 amp fuse.

vstol

Thanks for your responses. I used a hot wire to the switch then to the relay, it should work fine.

John S 1961

bad idea to run that much current through a switch, should be on a relay.

vstol

I have a LT4 with a modified harnes which has the fuel pump relay in it. Just need a power source.