| jfarrell | -- 03-05-2011 @ 5:36 PM |
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I plan to install an electric fuel pump that I can activate with a toggle switch. The car is still a positive ground 6-volt system. The electric fuel pump has two wires. One is black and is supposedly the ground wire. The second wire is marked with a "+" sign. Do I hook up the "+" wire to the ground and the black wire to the "hot" wire? I recognize this is a bonehead question, but thanks for the help. Jim Farrell
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| proxie35 | -- 03-05-2011 @ 6:50 PM |
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The fuel pump is only looking for Bat. & Grd. to operate. It doesn't care how it comes out of the Bat. I think you should test the pump, by touching the grd. wire to the grd. post of your Bat. & touch the + lead to the bat. post & the pump should operate. Hope this helps. Sherrel
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| Kens 36 | -- 03-05-2011 @ 6:51 PM |
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Jim, You are correct. The wire marked + would go to ground. Ken
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| proxie35 | -- 03-05-2011 @ 7:05 PM |
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Ken, Ground is ground & The only reason it is called Postive Ground on our fords is because of the way the Battery is Charged, You can take a Postive Ground battery & drain it completely down & then recharge it Neg Grd. it will work in your GM cars.
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| 47Jack | -- 03-06-2011 @ 9:11 AM |
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Is the fuel pump directional and the polarity would determine the direction the pump is running? Just curious, Jack
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| supereal | -- 03-06-2011 @ 10:11 AM |
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Usually, the pumps have permanent magnet motors, and the direction of rotation, and thus flow, is determined by the polarity of the input. That is why these pumps are supplied with two connections.
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| jfarrell | -- 03-06-2011 @ 11:26 AM |
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Now I'm confused. I hooked the electric fuel pump up so that the positive wire is to ground and negative is to power. The fuel pump runs when I turn the switch on. I did not think to check it to see which direction it was pumping, but will do so. Do the comments about "polarity" mean that it could be pumping towards the tank depending how I've got the wires hooked up? (I recently bought the electric fuel pump from C&G.) Jim Farrell
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| 47Jack | -- 03-06-2011 @ 11:48 AM |
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I didn't intend to confuse you Jim, I was just pointing out that if the polarity was reversed so would the rotation. The way you described your connections I think you have it correctly. Jack
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| supereal | -- 03-06-2011 @ 12:31 PM |
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If positive is battery ground, then the + lead is connected to a good ground. No mystery there. If you install a pump in a negative ground car, the reverse is true.
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