Yes, it will work but you will bypass safety features inherent in the stock
A relay would be a good idea, since the pump may pull enough power to overload
In a stock setup, when you first turn the key on, a fuel pump relay runs the
pump for a couple of seconds to pressurize the system for start-up. After
that, the fuel pump won't run until there's oil pressure.
That way, if you lose oil pressure (low oil or car is upside down via a
rollover) the fuel pump will shut off.
With a switch, it's on all the time and in an accident it will run fuel out if
there is a broken fuel line. Can be risky.
Horsepower is cheaper than therapy.
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