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  1. #1
    LTX Member


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    Josh
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    53 Chevy Truck (LT1 swap)
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    Default Engine Swap Wiring Harness Q's

    Swapping a Caprice '94 LT1/4L60E into a '53 Chevy truck. Harness was butchered. Went to Pick-N-Pull and got a complete harness from a '96 Roadmaster.

    According to LT1Swap.com I can interchange harnesses and PCM's. The PCM being used is the one from the '94.

    So, biggest question, is - can anyone provide a layout of what connectors are for what on the '96 harness? I'm guessing I'll need to change some connectors. I have it laid out across the engine with the obvious connections made and plugged in at the transmission.

    Thanks for any help. New to LT1's.

    Josh Hucks

  2. #2

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    Biggest issue off hand I can think of is the 96 PCM will be looking for a crank sensor that is not there on the 1994 motor. I don't think it will cause major issues outside of a SES light.
    Correlation does not imply causation.

    Una salus victis nullam sperare salutem

  3. #3
    LTx Guru


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    Fred
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    1994 Formula - SOLD
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    Default

    He indicates he is using the 94 Caprice PCM.

    Shoebox has a detailed, labeled photo of a 95 F-Body harness. Doubt the Caprice is the same, but here's the link:

    http://shbox.com/1/harness.htm
    SOLD - GONE TO A (VERY) GOOD HOME ! - 94 Formula A3+1: 381ci forged stroker - Callies Stealth, Oliver 5.85 billet rods, BME nitrous pistons / CNC LT4 heads / CC solid roller / TH400+GearVendors OD / 4.11 Strange 12-bolt / 300-shot N2O / Spohn Suspension / roll bar / MoTeC M48 Pro engine management system /a few other odds 'n ends.

  4. #4
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    Default

    Thank you, I will keep trying to research. May just hold out for a ‘94 harness.

  5. #5
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    Shaun
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    1994 Formula
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    Default

    Quote Originally Posted by Jhucks03 View Post
    Thank you, I will keep trying to research. May just hold out for a ‘94 harness.
    96 harness will plug right into a 94 pcm, pcm connectors are the same. you will just have unused stuff (rear o2's, crank sensor, different coil connection)
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  6. #6
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    Freddie Mendoza
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    Default

    I pulled a lt1 out of a 96 impala and want to drop it in my 65 impala. I have the pcm and harness what would my first step by to get power to the pcm

  7. #7
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    LDM
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    1994 Camaro Z28
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    Quote Originally Posted by 65IMPALA View Post
    I pulled a lt1 out of a 96 impala and want to drop it in my 65 impala. I have the pcm and harness what would my first step by to get power to the pcm
    Since this is going into a different vehicle, you'll need to get the wiring diagram for a 96 to determine which pin goes to what wire.

    http://lt1swap.com/lt1_pcm_pinout.htm

    That site has a good list of the pinouts. You'll need to connect the power and grounds to get the PCM powered up properly.

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