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Fuel Pump relay tpi to carb wiring

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Old 04-18-2005, 05:11 PM
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Fuel Pump relay tpi to carb wiring

I swapped from TPI to carb and through research and schematics I think I have figured out how to wire the fuel pump relay. But I am looking for confirmation.

I have five wires coming from the relay.
1) Orange goes to the battery and the oil pressure cut off switch.
2)Black and white goes to engine ground.
3) Green goes to twelve volt switched source
4) Red wire goes back into car to aldl connector and I can just leave it connected.
5)The tan and white wire would be routed in a three way junction back into car to fuel pump, to the relay and to the oil pressure cut off switch.

Finally there is a tan wire from the cut off switch which could remain connected into the car and with all the wires hooked up this way the fuel pump should function as normal. Thanks to anyone who can offer any corrections or confirmation. -John
Old 04-18-2005, 07:30 PM
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Re: Fuel Pump relay tpi to carb wiring

Originally posted by 383 rocket bird
1) Orange goes to the battery
2)Black and white goes to engine ground.
3) Green goes to twelve volt switched source
4) Red wire goes back into car to aldl connector and I can just leave it connected.
5)The tan and white or grey wire would be the output wire of the relay sending powre to the pump. It also gets power from the oil pressure sending unit.
Old 04-18-2005, 08:01 PM
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I hope that by quoting me you are affirming what i thought in my first post. Thanks again -John
Old 04-18-2005, 09:53 PM
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Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Pin "A" is tan/white and goes to the fuel pump, oil pressure sending unit, MAF sensor power relay & ECM for fuel pump signal..

Pin "B" is black/white and goes to engine ground.

Pin "C" is dark green/white and also goes to the ECM.

Pin "D" is red and depending on the year of the car either goes to terminal "G" of the ALDL or is a diagnostic connector coming out of the fuel pump relay wire bundle.

Pin "E" is orange and goes to the positive post of the battery and has a 20 AMP in-line fuse near the battery.
Old 04-19-2005, 11:48 AM
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Thanks trickster I was hoping you would reply. I had figured that out mostly already through schematics and tracing the wires but I am trying to figure out how to still utilize this set up without the ecm. I was thinking that

A-to fuel pump, oil pressure sending unit, ground
b- ground
C-switched 12 volt source
D-remain connected to the ALDL
E-orange to battery power

I read a post from RB83L69 where he said this relay would function as normal if everything was left connected except fot the tan and white, and the dark green and white where they previously hooked to the ecm. These should be connected to ground and a switched twelve volt source respectively. Thanks again -John
Old 05-19-2005, 02:31 PM
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I want to wire my pump to the oil pressure switch also. If I remember right, I have the green wire running to a 12v source when the key is on. The pump runs the whole time the key is on. I want to do it right, but im not sure what I need to do also.
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