Does anyone have experience swaping a 1995 LT1/4l60e into a 1993 z28/ta? I pulled the engine/transmission out of a wrecked 1995 TA, i have the computer and wiring harness. What do i need to do to hook the 1995 harness up to my 1993 Trans Am?

 

use the 93 harness, it will make the job much simpler, everything just plugs right in.

 

BTW: do you want the 95 harness because of the speed density?

 

Uh the 95 is MAF, the 93 is Speed Density. There will be about 4 or 5 missing plugs if you use the 93 on a 95 engine. I suggest dropping in the harness as well, since it'll need to control the tranny anyways. 93's use a 700R4 (4L60).

Do you have the computer for the 93 still? If it's for a automatic, I'd be interested in maybe buying the chip from it. Mine's toast :\

 

Let me explain a little bit more. I bought a 1993 TA that was set up for a sbc/th350 combo, i dont have the 93 engine harness or computer. I bought a running 1995 TA last week and took the motor/tranny/comp/harness out of it. I have all of that in my 93 now and I am trying to figure out what to do with the connectors that are on the passenger side shock tower? The 1995 engine harness has a orange wire in the c100 connector but the 1993 doesnt, this site says the wire is for the pcm power so i think it should be hooked up http://shbox.com/1/harness_connector_faces.htm. Any help would be great.

 

Anyone

 

you will have some probs trust me i know..i sold my motor and just rebuilt the one that was in the car...the wiring setup can be a real headache

 

to make it work like factory get the whole entire dash harness, cluster ect... anything thats attached to the harness from the 95 and install it in your 93, that way everything will plug in and work like a factory 95.

 

I am not using the factory gauges so i dont care about those. All i really want to do is get it running.

 

I agree, get all the wiring. That'll make it easier on you.

 

I have the wiring that goes into the passenger compartment figured out. Post #5 in this thread is my question, can anyone help? Im not going to transfer the whole harness from the other car.

 

Anyone with personal experience?? I am about to burn it to the ground

 

This might help: http://cgi.ebay.com/ebaymotors/82-83...01989850QQrdZ1

I bought one of these some time ago. It's a CD with a number of wiring diagrams in PDF format, including those for V-6 and V-8 Camaros for '93-'94, '95, and '96-'98 years. You may go blind or crazy chasing the differences, but there's a reasonable chance it's all there.

Good luck. -- Gary

 

I have a shop manual and all the diagrams. I know where the wires are and what they do, i just dont know what to connect them to on the 1993 harness. Can i hook the wires up that are "power feeds" to any fused power source as long as its hot when it is supposed to be? A better question might be, how do i hook up the engine/tranny/comp/harness in a non LT1 car? Anyone that has installed a LT1 in a non LT1 car how did you hook up the wiring harness?

 

well, you may be in luck there. Im doing a '93 to '94 drivetrain right now as well. Ive got all the in car connectors figured out I believe. I havent look at this wire you speak of just yet. You say its c100? which pin? I have access to the diagrams as well and I will look into this because my engine is going in next weekend. Also, you need to move some wiers in the connectors in the car, otherwise you're going to send 12v down the serial data wire when you power up and crank. Its labeled as fuel pump feed, and goes to a "fuel pump prime" connector near the pcm. I have not looked for this connector, but I do know that it will end up feeding power down the serial data (tan) wire if you just connect all the underdash connectors.

 

Thats why we said get ALL the wiring. Thus, no more 93 wiring under the hood or dash. You'd be converting the car's dash forward wiring, totally to 95.

 

ok, i did some research, and I think I see what they did. Instead of routing the serial data wire through the passenger kickpanel as on the later years, in '93 it looks as though its routed around the engine bay possibly. The wire you need powered up, the orange one, should go to fuse 8 of the '95 fuse block, but yer not dealing with a '95 fuse block anymore right? Do you even have the fuse block portion of the harness? If not, then you can connect it to something hot while key on, like ignition. But again, make sure you dont have the other side of that connector connected to the serial data wire because thats the pin location it would connect to if you had the '93 fuse block harness. Let me know how yer doing and any more stumbling blocks you encounter as Im in the same boat but I have access to the info we need so keep me posted.

 

I still have the 93 fuse block and front lighting harness under the hood but the connectors have been cut off on the passenger shock tower. I think i have most of the wiring figured out now. Since I am not going to running the factory cluster do i need to hook up the serial data wire? I just got done wiring up the push button ignition so now atleast it will crank over

 

on the '95 harness the serial data wire will be in the passenger kickpanel connectors, its tan. You want to run that wire to the diagnostic connector under the dash so you can scan the vehicle. Or, you can pull it from the connector in the passenger kickpanel and connect it to the '93 forward harness, BUT theres no telling if someone didnt hack that wire somewhere, so you best bet it to leave it in the car on the '95 harness and run it directly to the dlc (data link connector) that way you know its good. Otherwise, you can do continuity checks from one end of the wire to the other with a ohm meter but that gets frustrating and sometimes requires more than one set of hands without the proper tools.
Ok, heres what I got. On a '94 harness which is very similar to a '95, serial data will be tan and in connector C220 (white) in the passenger kickpanel. If you havent figured out where that length of harness with the 4 conenctors goes, it routes through the firewall behind where the PCM sits and feeds the cluster and some other stuff. This is where C220 goes. Its pin F. Like I said, run that to the DLC, pin M. You will see the tan wire, just clip it and solder to it. Thats the easiest way.
As for the orange power wire you were talking about, I believe Ive found that to be the PCM battery power, not ignition power. That means this is vital for PCM memory functions and you need to hook it to constant power, not switched power or it would be like taking your battery out everytime you turn the car off, and the PCM will lose its memory. Everytime you start the vehicle it will have to relearn driveability parameters and you dont want that. Check your manual for this wire, in my '95 harness pinout it says its circuit 340. If were talking about the same wire, then do as stated above and connect it to constant power either in your fuse block or elsewhere. One more thing, it looks as though circuit 340 goes to 2 different pins in the PCM connectors themselves, one in B15 and one in B31 (black PCM connector). So check both wires and make sure you have continuity on both pins to that wire yer connecting to power.
Keep it coming, yer making this easier on me for next weekend as I want mine in and running by the end of the day, without frying the PCM. Be careful not to key on and try starting this beast until we have this all figured out or you may do so. But it sounds like you already cranked it over. Hope you havent spiked the PCM with 12V on the wrong circuits yet!

 

Good find on the C210 pinouts by shoebox. My sources dont have any info on that conenctor. Thats one less worry now. I wasnt sure what those wires went to yet as 93 94 and 95 vary there as far as shoebox' info. I now see also that in '94 the PCM power wire you speak of comes from this C210 connector and in '95 it comes from the C100 connector. Looking at my sources though, it says that in '93 it DOES come from C210 also, but shoebox' pinout says that there is no wire in C210 cavity C. My info says there is and its the same as '94. Hope im not confusing you more than helping you, but this is what Ive found and I dont have the '93 car in front of me to run out and check, its at work. So if you look under the passenger dash for the 4-pin C210 connector and pin C is an orange wire on the dash side of the harness, thats where you want to connect your orange wire from C100 and you will have it correctly powered from the PCM BATT fuse. This just makes ife easier in the future for repairs. '95 PCM BATT comes from the underhood fuse block and '93 '94 comes from the in car fuse center. Thats where the difference is.

Keep the problems coming bro and we'll get this straightened out. Down with the naysayers!