Wiring up the fuel pump
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Wiring up the fuel pump

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    Default Wiring up the fuel pump

    Wiring up the fuel pump in the cruiser. Asked for a yes/no in another thread but at the risk of offending anyone or detracting from that issue... sheesh. Where can I pull power for the pump short of going clear to the dash?

    The MSD thread had a post that sometimes they're wired to the + post on the starter, but does'nt that only get power during cranking? But then too, if running the alternator output to it, does it provide juice when the key is at run?

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    cfm
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    It really isn't a yes/no since it is more of a maybe. The maybe is because of how you have your starter wired. Most have a direct set-up where battery cable goes direct to starter solenoid + lug and a small wire going to the small terminal to the right of the lug coming from the ignition or solenoid. In this case the + lug on starter will always have power.

    Others will use a remote solenoid in between the the starter + lug and battery. In this case, the + lug will usually only have power when starter is engaged.

    That's the maybe. How is your starter wired ?

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    Senior Member Hass828's Avatar
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    Quote Originally Posted by Hallettbutt View Post
    Wiring up the fuel pump in the cruiser. Asked for a yes/no in another thread but at the risk of offending anyone or detracting from that issue... sheesh. Where can I pull power for the pump short of going clear to the dash?

    The MSD thread had a post that sometimes they're wired to the + post on the starter, but does'nt that only get power during cranking? But then too, if running the alternator output to it, does it provide juice when the key is at run?
    Use a 40amp relay with a #10 wire from your battery to the relay and then to your pump,then wire the pos. from the relay coil to any pos wire that becomes hot when the ign. is on , last, wire the neg from the coil to a ground , thats it. Very simple and no new wires to the dash.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by Hass828 View Post
    Use a 40amp relay with a #10 wire from your battery to the relay and then to your pump,then wire the pos. from the relay coil to any pos wire that becomes hot when the ign. is on , last, wire the neg from the coil to a ground , thats it. Very simple and no new wires to the dash.
    Yes.

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    If you hook to a "hot" when the key is on then the fuel pump will be on, correct. Well lets say you get tossed out, fuel is still on, right. Key is on for radio or ????, then fuel pump is on, right. I wired mine to the dash on a lanyard, I get tossed no more fuel. I want power for the radio or what ever, just pull the cap off, no more fuel. Many ways to skin a cat.

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    Good points. I'm more just trying to not have to do another run to the transom, but the notion of running to a relay is sound. Should the starter be run to a relay as well. If you all have some part #'s, cool. And thanks.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by Hallettbutt View Post
    Good points. I'm more just trying to not have to do another run to the transom, but the notion of running to a relay is sound. Should the starter be run to a relay as well. If you all have some part #'s, cool. And thanks.
    Starters all are relayed in some manner, some integral, some external. If you want to "double-relay" it, that's up to you. One more item to cut off power in case of a relay sticking closed, ALSO one more electro-mechanical item to fail or give trouble.

    Take your pick.

  10. #8
    Senior Member Hass828's Avatar
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    You can go to any place that sells parts for big trucks and they will have the cube relays and they are only 6-8$ I usually grab a hand full when I go to Rush truck center in Durant , OK

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    Got er done. Thanks everyone.

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