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Trying to figure out wiring in engine compartment for 1990 irocz. help plz?!?!?!

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Old Jan 6, 2010 | 08:18 PM
  #1  
irocz90's Avatar
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Car: 1990 Chevrolet Camaro Iroc Z
Engine: 427 Dart SBC
Transmission: TH 400
Axle/Gears: Ford 9" 4.11 gears
Trying to figure out wiring in engine compartment for 1990 irocz. help plz?!?!?!

i am trying to eliminate all of my wiring harnesses under the hood of my camaro. i have a 427 dart block making 700 horsepower and dont need anything but the basic wiring. the previous owner hacked into many of the original harnesses and i dont know what i can cut out and what i cant. i still want headlights, tailights, blinkers, cab lights, and windshield wipers. my car is street legal and i want to keep it that way. my main confusion is what are those relay boxes in the driver side firewall corner of the eng. compartment and what do they do???? pics of wiring harnesses explaining what things are and what they do would be great!
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Old Jan 7, 2010 | 06:39 AM
  #2  
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Car: 91 Trans Am
Re: Trying to figure out wiring in engine compartment for 1990 irocz. help plz?!?!?!

https://www.thirdgen.org/forums/ltx-...p-3rd-gen.html

Relays are for Fans, fuel pump and AC compressor clutch
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Old Jan 7, 2010 | 12:34 PM
  #3  
irocz90's Avatar
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Junior Member
 
Joined: Jan 2010
Posts: 8
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Car: 1990 Chevrolet Camaro Iroc Z
Engine: 427 Dart SBC
Transmission: TH 400
Axle/Gears: Ford 9" 4.11 gears
Re: Trying to figure out wiring in engine compartment for 1990 irocz. help plz?!?!?!

so therefore i wont need any of them. now i just need to figure out what wires he spliced in, then make myself a wiring harness. thanks i appreciate it
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Old Jan 7, 2010 | 01:57 PM
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From: NC
Car: 91 Trans Am
Re: Trying to figure out wiring in engine compartment for 1990 irocz. help plz?!?!?!

The pinouts are in here
https://www.thirdgen.org/forums/ltx-...formation.html

Pretty much you need the C100 and a few gauge wires

Find a TBI car or 86-89 Fbody and grab the VSS buffer box to drive your speedo. Everything else should work the same as the EFI
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