need wiring help or diagrams

Hi every one I am very new to obs trucks, please excuse the book I wrote but I figgured I would ask all my questions at once. I need some help with some wires or a wiring diagram for a 93. I'm almost done with my project just have a few problems. I am working on a 93 that i dropped a 98 LS1 and 6spd in. I did some research on the cruise control and pretty sure i figgured it out, but skeptical because on the 98 the cruise contol didi not run through the PCM. I have every thing pretty much wrapped up except 8 wires comming form the drivers side firewall. 1- green, 2-brown, 1-brn&wht, 1-purple, 2-black obviously grnd, and 1-blk&wht I think is grnd. Also what do i need to hook the speed sensor wires that go to the cab to? I think vss output from the comp but that only has one wire where as the original harnness has two. I have one more question, I have no clue what to do with the a/c compressor wiring. I have a sanden comprssor that has only one black wire comming off the clutch assembly and i have no clue what or where to hook it to.

The search button can be your friend here. I did the exact same swap, minus the 6 speed and I rewired for a 2002 PCM instead of 1998.

The speedo for the instrument panel and cruise control hook up to the 98 PCM output. The speedo wire from the PCM hooks to the dash lead and the cruise lead. Drop me a PM to remind me and I can go out and look at the wires you need to tie together tonight.

Black wires are engine block grounds. Black with white tracers are chassis grounds. Same difference, lol.;)

Do you want the LS1 computer to control your Sanden A/C set-up, or do you want it to be controlled as it was before the new engine & computer?

Speedometer and cruise control hookup for 1993 fullsize truck...

Green speedo output wire from PCM, first cut the light blue wire and the red wire with white stripe from the DRAC module behind the glove box. Use a blue butt type crimp connector and insert the two wires into one end of the connector and crimp. Place the speedometer output wire from the PCM into the other end and crimp. You should now have speedo and cruise fully functional. :thumb:

The green wire from the low pressure control switch at the drier tank should have a lead that hooks to the clutch power lead. You can have a high pressure switch added to the HP line. Get one that feeds the correct pressure readings back to the PCM for a/c controls or you can just get one that cuts power to the compressor at a specified high pressure reading.

Thanks for the help guys, I was hoping to run the sanden pump throught the ls1 computer. As far as the pressure switch goes I figured that one of the leads for the ls1 switch is a ground so I was thinking of grounding it out permantely and the splice the original pressure switch which is a two wire.

well not sure if it is still the same or not but just found out that its not a 93. it is a 95 should the placement of the drac module be the same? I read your post from a while back but noticed that there was not a conclusion for the 95 setup.

Hey Red I will try not to write a book here. I was wondering if you knew a way to make the stock cruise switches on an 81 k5 silverado work with the cable driven throttle body on an '01 6.0, I know that it has that control box I figured all the buttons function the same why couldn't they be spliced some how? What all wires do I need to connect to what for the obd2 from the ecu? Is there a detailed thread on how to make the harness stand alone? or maybe a detailed thread on using the stock fuse block for the swap? If you used the stock fuse block out of a truck you could in theory just cut all the leads that go into the cab an use those wires to conect to for all your connections right?

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Originally Posted by Shrekenator

Hey Red I will try not to write a book here. I was wondering if you knew a way to make the stock cruise switches on an 81 k5 silverado work with the cable driven throttle body on an '01 6.0, I know that it has that control box I figured all the buttons function the same why couldn't they be spliced some how? What all wires do I need to connect to what for the obd2 from the ecu? Is there a detailed thread on how to make the harness stand alone? or maybe a detailed thread on using the stock fuse block for the swap? If you used the stock fuse block out of a truck you could in theory just cut all the leads that go into the cab an use those wires to conect to for all your connections right?

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Sorry for diggin up another old thread but can someone answer this guy's questions? His questions are the same or similar to some of mine.
Thanks

Nobody has written a detailed account of how to modify a stock harness on this website, that I can recall. If you go to LS1TECH.COM and look in their conversion/hybrid section there are a few stickies with good details on modified car harnesses. As for the old vacuum style cruise control, I haven't a clue. Surely it can't be too hard if you find a wiring diagram for how it works in stock configuration. You can probably modify a newer style electronic cruise control module that was mounted on the firewall.

Thanks Red. I'll have to check out that site. I kinda figured it would just be a bunch of camaro and TA guys.
I'm good with mechanical stuff but I'm so wiring-retarded I'll probably need a harnesses for dummies book even after buying a Nelson harness for my swap. In fact, I'll probably post a thread on it later. I emailed info@nelsonperformance.com and pm'ed farmtruc with no replies from either one so I'm lost.