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

LQ4 stand alone wiring harness

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Old Sep 13, 2009 | 11:47 AM
  #1  
ironcladwelding's Avatar
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From: enpt new york
Car: 87 tran am gta
Engine: lq4 swap in works
Transmission: t56
LQ4 stand alone wiring harness

Help! I have a 1987 Trans Am with a 6 litre LQ4 motor with a stand alone wiring harness. Can anyone help me hook fuel pump relay from '87 Trans Am so it'll work?? I can get fuel pump to pump fuel only by hot wiring it. Doesn't work through the relay. Can I use the stock relay or is there an after market relay and pressure switch that I can use to shut off fuel pump? I have one wire coming out of the OBD II that says fuel enable. Where would I hook that up??? I'm clueless. Any info would be appreciated!! Joe
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Old Sep 25, 2009 | 04:03 PM
  #2  
1ADan's Avatar
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From: Pepperell, MA
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: LQ4 stand alone wiring harness

Welcome!

not trying to pass the buck, but you'd probably get a better answer to this one over in the LTx/LSx engine swap section of the forum.
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Old Sep 25, 2009 | 04:53 PM
  #3  
Stephen's Avatar
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: LQ4 stand alone wiring harness

Your fuel pump relay shouldn't have anything to do with the wiring harness itself. All the relay really needs is key on/off power.

IIRC, I don't think the wiring for it, is even in the engine compartment at right, so I dunno why yours would have stopped working.
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Old Sep 26, 2009 | 06:30 AM
  #4  
ironcladwelding's Avatar
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Joined: Jun 2009
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From: enpt new york
Car: 87 tran am gta
Engine: lq4 swap in works
Transmission: t56
Re: LQ4 stand alone wiring harness

Originally Posted by Stephen
Your fuel pump relay shouldn't have anything to do with the wiring harness itself. All the relay really needs is key on/off power.

IIRC, I don't think the wiring for it, is even in the engine compartment at right, so I dunno why yours would have stopped working.
thanks for the info got fuel pump relay to work still don't know what red wire is for comeing from harness
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