pump wiring
09-21-2012, 01:28 PM
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pump wiring Ok, well, got a mp-4303 fuel pump, and i wont be using my old pump whatsoever. Is it possible to just splice into the old fuel pump wiring harness that plugs into the sending unit to power my fuel pump? Any help will be appreciated. yes, i searched, but nothing specific came up for my current question.
Last edited by nick.celis; 09-21-2012 at 02:48 PM.
09-21-2012, 01:57 PM
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Next question, i see on the racetronix PNP hotwire kit, that it uitilizes the factory pump power harness. Could i just splice into that for power to my 4303 since i wont be utilizing my old fuel system whatsoever?
Last edited by nick.celis; 09-21-2012 at 02:44 PM.
09-22-2012, 10:52 PM
#7
It's pretty easy. I've run mine that way in the past and it works just like a factory pump.
Run a heavy gauge power wire direct from the battery (or even back of the alt.) to the input side of a 40amp relay.
Run a heavy gauge power wire out of the relay directly to the pump
Ground the relay
Ground the pump
Use the factory fuel pump power wire to trigger the relay.
Run a heavy gauge power wire direct from the battery (or even back of the alt.) to the input side of a 40amp relay.
Run a heavy gauge power wire out of the relay directly to the pump
Ground the relay
Ground the pump
Use the factory fuel pump power wire to trigger the relay.
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09-22-2012, 11:53 PM
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It's pretty easy. I've run mine that way in the past and it works just like a factory pump.
Run a heavy gauge power wire direct from the battery (or even back of the alt.) to the input side of a 40amp relay.
Run a heavy gauge power wire out of the relay directly to the pump
Ground the relay
Ground the pump
Use the factory fuel pump power wire to trigger the relay.
Run a heavy gauge power wire direct from the battery (or even back of the alt.) to the input side of a 40amp relay.
Run a heavy gauge power wire out of the relay directly to the pump
Ground the relay
Ground the pump
Use the factory fuel pump power wire to trigger the relay.
09-24-2012, 05:12 AM
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ordered a 10ga fuse holder with 30amp, and my 30amp relay. Now just got to get some 10ga wire and im all set on my fuel system wiring. Once again, Thanks Blown06 and DopeFedZ
09-24-2012, 06:14 AM
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09-24-2012, 12:13 PM
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im only running one big pump 
didnt want to have to rely on a hobbs switch, and its not my DD so im not to concerned with the heat/vapor lock, not to mention im running a -10 feed and -8 return
didnt want to have to rely on a hobbs switch, and its not my DD so im not to concerned with the heat/vapor lock, not to mention im running a -10 feed and -8 return 