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fuel pump relay (harness help)

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Old Oct 30, 2016 | 05:12 PM
  #1  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
fuel pump relay (harness help)

here is the back story

Car was originally tpi i cut the harness many years ago and made it carb
-- mechanicel fuel pump and all i left the efi pump in the tank
-- all of the engin bay harness from the tpi are gone

i put a holley stealthram with a commander 950 ecu and complete harness most sensors
i bought it used

i suck at wiring without a diagrahm .

so my question is. the fuel pump relay harness is gone what do i need to know about putting another one in. diagrahms would be awesome or any intel electrical is my week point
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Old Oct 31, 2016 | 09:07 PM
  #2  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)

what color wire is the fuel pump prime wire?
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Old Nov 1, 2016 | 07:56 PM
  #3  
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From: Desert
Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: fuel pump relay (harness help)

Without knowing exactly what you pulled and left I'm just shooting in the dark. Did you remove the entire engine side of the C100 connector on the drivers side of the firewall?
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Old Nov 1, 2016 | 08:29 PM
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Car: '89 Firebird
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Re: fuel pump relay (harness help)

The fuel pump wire is the TAN/WHITE wire that comes out of the "C100" connector on the driver side firewall (next to brake booster). Give it +12V and the fuel pump will run.
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Old Nov 1, 2016 | 08:43 PM
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)



Thats all thats left other then the wiper plug
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Old Nov 1, 2016 | 08:55 PM
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Re: fuel pump relay (harness help)

C100 is the big wad of wires coming through the firewall, just under the white container in the picture.

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Old Nov 1, 2016 | 09:43 PM
  #7  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)

Ok i see which one it is.
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Old Nov 12, 2016 | 05:02 PM
  #8  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)

No good checked & changed the fuse too. Im going tontake a power probe to the connector under the car.

What is that above the brake booster
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Old Nov 12, 2016 | 05:03 PM
  #9  
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Re: fuel pump relay (harness help)

That is the module for the pop-up headlights.

Last edited by QwkTrip; Nov 12, 2016 at 05:08 PM.
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Old Nov 12, 2016 | 05:07 PM
  #10  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)

Dam i was hoping to remove it ill just relocate it.
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Old Nov 12, 2016 | 05:09 PM
  #11  
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: fuel pump relay (harness help)

The fuel pump fuse isn't connected to that wire any more because you eliminated the original fuel pump relay.

Unplug the connector behind the back seat and check wires at C100 until it passes a continuity check (Ohm meter).
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Old Nov 12, 2016 | 05:36 PM
  #12  
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From: North Jersey
Car: 1987 GTA
Engine: 383
Transmission: Tremec 3550
Axle/Gears: 373
Re: fuel pump relay (harness help)

Hmm good point didn't think about that. That's why i was going to use my power probe

The car hs always been a wiring. It was cut spliced by previous owners 17 years ago before i got it then i went carburated then so i cut alot out.

I got a smoking deal on this so i pulled the carb off
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