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LT1 wiring

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Old 10-24-2005, 04:30 PM
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Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
LT1 wiring

Ok, Don't think i'm stu[pid or anything, here is what I have:

92 RS
95 LT1 from an F-body
700R4 from my car
Engine harness for a 95 LT1 (f-body)


I need to know how to hook all that to my interior, i guess i need a dummy version or somthing, i read all kinds of stuff on here, but its like it makes no sense. So if I could get like a version for LD people that would be great. Thanks
Old 10-24-2005, 08:44 PM
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read what i posted here about wiring:

https://www.thirdgen.org/techbb2/sho...hreadid=325732
Old 10-24-2005, 09:59 PM
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Car: 1989 Chevrolet Camaro
Engine: LT1
Transmission: 700R4
Axle/Gears: 2000 rear, 3.73, auburn locker
You could order a wiring harness booklet from painless.
Old 10-25-2005, 12:56 AM
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Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
I was looking at the Painless manual, and seen it had its own fuse box and check engine light, would this be easier to just buy that harness, as opposed to using the factory harness, or would it just be a waste of money?
Old 10-25-2005, 01:39 AM
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Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Originally posted by RebelRacer
I was looking at the Painless manual, and seen it had its own fuse box and check engine light, would this be easier to just buy that harness, as opposed to using the factory harness, or would it just be a waste of money?
The "painless" harness is going to just get you a few relays and a $20 fuse block over what you have, you'll still have to do a bunch of splicing, and it doesnt have the fan or a/c control relays, so for the most part you'd be paying a few hundred $ for a few wires to be pre labeled.
Old 10-25-2005, 09:15 AM
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Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
ok, i see about the painless harness. I got a couple more questions. Just how much splicing is involved? Also, is there a guide with exactly which wires need to be spliced?

thanks alot, i really apprecate all this help and sorry for throwing all the noob questions at you guys.
Old 10-25-2005, 09:41 AM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
You are going to end up spending about 500-700 bucks for the painless harness. Save the money and do it yourself since you only have to splice in about 8 wires. injectors, PCM power, PCM switched power, tach, oil, water, speedo and fans.

I have all of mine spliced in, I use the original check engine light, have my skipshift light hooked up to the shift light, and also have an OBDII connector so I can do my tuning as well. The hardest part is to trace the wires to hook up.

Last edited by Klortho; 10-25-2005 at 09:43 AM.
Old 10-26-2005, 07:36 PM
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In simplest terms, get the wiring diagrams for your year car and the diagrams for the car the engine came out of and compare the two. Use the shbox website for a photo of the LT1 wiring harness. Then, look at the wiring diagrams to find out where wires lead out of or into that harness into/from the chassis harness. These are the wires you will need to connect. They will include PCM power and ground, injector power, coolant temp, oil pressure, tach, speedo. Those are the basic ones you will need.
Old 10-27-2005, 11:30 AM
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Car: Bitchin' 92 RS
Engine: 350 TPI
Transmission: 700R4
well, you seem toknow about this pretty good, do you mind if I PM you some questions if i run into any problems?
Old 10-27-2005, 04:42 PM
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Car: 1982 Z28
Engine: LS1
Transmission: T56
Originally posted by RebelRacer
well, you seem toknow about this pretty good, do you mind if I PM you some questions if i run into any problems?
I get the feeling the questions are going to go like this:

"OK, what wire do I splice first?"

"Which wire next?"

"OK now which one...?"
Old 10-27-2005, 06:28 PM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
But you know what Kevin, I don't mind doing that....mainly because I've been through it, and know how it is trying to figure out reading harnesses, if my experience can help someone else get their car running then great. I've helped a couple of people so far and AFAIK their cars are running great.
Old 10-27-2005, 09:20 PM
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Originally posted by Klortho
But you know what Kevin, I don't mind doing that....mainly because I've been through it, and know how it is trying to figure out reading harnesses, if my experience can help someone else get their car running then great. I've helped a couple of people so far and AFAIK their cars are running great.

yup. RebelRacer, feel free to PM either of us, as I know we would both be more than happy to help.
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