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fuel pump relay |
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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Posted: Nov/27/2014 at 4:27pm |
i have two different relays im trying to wire.not sure which will work better, one is a 4 pin w/30,86,85,87 stamped,the other one is 5 pin w/30,86,87,87a,85,anyone have a diagram to wire these for a electric fuel pump?
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EagleFreek
AMC Addicted Joined: Oct/11/2008 Location: Fayetteville,TN Status: Offline Points: 828 |
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Either one will work. 87A has 12v when the signal power to the relay(86) is deactivated and won't be used. Fused power from the battery to 30, power to the fuel pump from 87, ground to 85 and power from 12v switch to 86 to activate(energize) relay. A fuel pump oil pressure switch would be the safest.
Edited by EagleFreek - Nov/27/2014 at 5:08pm |
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1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear. SOLD
1981 AMC Eagle Wagon-As Seen On TV Lost in Transmission |
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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ok,thanks,do you run a ground from relay to the switch?or just ground to the body for the switch?im new to wiring,thanks
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FuzzFace2
AMC Addicted Joined: Jul/05/2007 Location: Angier, N.C. Status: Offline Points: 10343 |
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I have the relay mounted to the trunk floor next to the batt. so only needed to run 1 long wire from IGN. switch to relay the rest are short wires, pump is mounted under trunk floor. Dave ---- |
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TSM = Technical Service Manual
75 Gremlin X v8 for sale 70 Javelin 360/auto drag car 70 Javelin 360/T5 Street car |
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EagleFreek
AMC Addicted Joined: Oct/11/2008 Location: Fayetteville,TN Status: Offline Points: 828 |
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Like Fuzzface said, you can ground 86 right to the body and 12v+ when in the run and start position to 85. If you want you can use a hidden switch on the power or ground and use it as a security feature. The reason for using an oil pressure switch, is so if you are in an accident, hopefully the engine will shut off and with no oil pressure, the fuel pump will shut off so it doesn't feed a a fire with fuel. http://www.summitracing.com/parts/crt-a68301?seid=srese1&gclid=CjwKEAiA1-CjBRDOhIr_-vPDvQYSJAB48SmEiQGFj-TaH-1ZJMfD2Hke5RVaLXtRfuMtT_F_EjdLfBoCPeLw_wcB
Edited by EagleFreek - Nov/28/2014 at 2:44pm |
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1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear. SOLD
1981 AMC Eagle Wagon-As Seen On TV Lost in Transmission |
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odd401
AMC Apprentice Joined: Jul/19/2014 Location: loveland Status: Offline Points: 158 |
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i understand now,i dont want to catch on fire if i roll it.thanks
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FuzzFace2
AMC Addicted Joined: Jul/05/2007 Location: Angier, N.C. Status: Offline Points: 10343 |
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Because mine is a drag only car with the batt. in the trunk I have to have a cut off switch that shuts down everything electrical clearly mark OFF.
I guess if used on the street I would go thru a oil psi switch. Wonder how they shut the pump off for the bolt on EFI systems does it pick up power from the dist.? Dave ---- |
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TSM = Technical Service Manual
75 Gremlin X v8 for sale 70 Javelin 360/auto drag car 70 Javelin 360/T5 Street car |
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jeremy0711
AMC Addicted Joined: Dec/12/2008 Location: Southern IN Status: Offline Points: 1547 |
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Edelbrock and FAST have no interaction with the oil pressure readings. I think you can set it up on the edelbrock but I know you can on the FAST as its on my screen with no readout. If the edelbrock didn't get any feedback from the engine then the pump is suppose to shutoff. Now how long it takes to do that is unknown. i am sure you would have enough gas out to burn up. I am not sure about the FAST setup. It would probably be a good idea to wire it up through the oil psi switch on your own as the computer wouldn't know any difference.
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FuzzFace2
AMC Addicted Joined: Jul/05/2007 Location: Angier, N.C. Status: Offline Points: 10343 |
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I was more thinking either or both got the "run" signal from the dist. and when the system did not get a signal from the dist. it would turn the pump off. Dave ---- |
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TSM = Technical Service Manual
75 Gremlin X v8 for sale 70 Javelin 360/auto drag car 70 Javelin 360/T5 Street car |
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