Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

Fuel Pump Relay?

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Old May 27, 2006 | 01:35 PM
  #1  
Quick-IROCZ's Avatar
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Joined: Jan 2006
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From: NY
Car: 1987 IROC-Z28
Engine: 305 Tpi
Transmission: 700R4
Fuel Pump Relay?

Where is it on my car? Is it near the firewall and underneath the big antenna cable? Does it have green/white and black coming out one side and light blue and black coming out the other or is that just a connector? to what?

If so, where is the relay? Is it a relay that looks normal with wires coming out of only one side and the other side is like a top hat? help me out!
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Old May 27, 2006 | 02:40 PM
  #2  
vorgath's Avatar
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Joined: May 2005
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From: San Diego, CA
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
On the driver's side, you should, at the firewall yes, have something like a bracket cover, holding two relays, one of them being the fan relay, the other one being the fuel pump relay.

Both relays are identical, so be sure to know which one is which, if I remember correctly, the fuel pump relay's wires are red, orange, green/white, black and grey I believe.

I managed to fry my fuel pump driver on the ECM when I was wiring stuff into the wrong relay, wiring a manual fan switch.


What's your exact problem ??
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Old May 27, 2006 | 03:50 PM
  #3  
Quick-IROCZ's Avatar
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Joined: Jan 2006
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From: NY
Car: 1987 IROC-Z28
Engine: 305 Tpi
Transmission: 700R4
Originally Posted by vorgath
On the driver's side, you should, at the firewall yes, have something like a bracket cover, holding two relays, one of them being the fan relay, the other one being the fuel pump relay.

Both relays are identical, so be sure to know which one is which, if I remember correctly, the fuel pump relay's wires are red, orange, green/white, black and grey I believe.

I managed to fry my fuel pump driver on the ECM when I was wiring stuff into the wrong relay, wiring a manual fan switch.


What's your exact problem ??
Fuel Pump starts up every other start when in ON/Power position. I want to make sure the fuel pump isn't faulty before I attempt to replace it.

I swear to god, all of these colors are messed up, I'm seeing BROWN on 2 relays where you told me to looks, and the middle one without the brown only has 4 wires coming out of it!!!

Last edited by Quick-IROCZ; May 27, 2006 at 05:26 PM.
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Old May 27, 2006 | 04:22 PM
  #4  
arcmaster's Avatar
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Joined: May 2006
Posts: 11
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From: Pacific,Mo
Car: 89 IROC
Engine: 305
Transmission: Auto
Axle/Gears: 2.73
Fuel Pump relay

On my 89 it's the one out in front of the others with the plug thats flat, hope this helps,if you have any more questions 636-448-5888[Barry]
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Old May 27, 2006 | 05:28 PM
  #5  
Quick-IROCZ's Avatar
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From: NY
Car: 1987 IROC-Z28
Engine: 305 Tpi
Transmission: 700R4
Originally Posted by arcmaster
On my 89 it's the one out in front of the others with the plug thats flat, hope this helps,if you have any more questions 636-448-5888[Barry]
That one has the pattern:

Orange, Dark Blue, Brown/White, Black/White, Red

and I don't know what you mean by flat plug..wait, I see it, let me try that one, third from the right, right??

*EDIT I FOUND IT,
I took off that one listed and started the car to power, and heard the fuel pump working, so I put that one back on and tried the one with rubber backing, fuel pump still working, I took off the relay on the corner of the firewall and the driver's fender, 8 starts, no fuel pump, I HAVE FOUND THE FUEL PUMP RELAY. I'm going to autozone after dinner, maybe they have one. On second thought, it may be cheaper from Rockauto.com, where I bought my AC fan relays from.

Last edited by Quick-IROCZ; May 27, 2006 at 06:34 PM.
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