87 z28 / 97 lt1 swap help

[NEKansas]

I have the LT1 in car, car was originally TPI. motor mounts hooked up, fuel lines done, P.S lines done, etc, etc. All wires are hooked up except C100, C105, C210, C220 and C230 connectors. On to wiring. I have tried looking at schematics, lt1 swap start to finish thread at thirdgen org, lt1swap com, wiring for dummies thread thirdgen org, etc and I dont grasp some things well but I think I am very close. IF I understand correctly this is how i will wire my 97 LT1 from a T/A: PLEASE correct me if I am wrong.

LT1 C100 PIN A PINK pwr feed from injector #9 run to C207 PIN G wire at my 87. This will feed pwr to 4 of my injectors

LT1 C100 PIN G PINK pwr feed from IGN (this is something to do with ignition, not sure what) run to any factory switched pwr wire PINK on my 87?

LT1 C105 PIN B PINK pwr feed from Injector #10 run to C207 PIN B wire at my 87. This will feed pwr to my other 4 injectors

LT1 C210 PIN C ORNG pwr feed from PCM run from this to C100 A4 wire at my 87. This will feed pwr to PCM

LT1 C210 PIN A PRPL thft deter relay to starter I believe I will run a wire from this to C100 B4 wire on my 87. This will power my starter

LT1 C210 PIN D RED fuel pump feed run from this wire to C207 PIN D wire on my 87. This will pwr my fuel pump

C220 PIN E PINK pwr feed from PCM IGN run from this wire to a factory switched pwr wire on my 87?

C230 PIN G PINK pwr wire for an engine sensor? (not sure what this is for or where to run it)

I understand I would still need to wire ALDL and ALT. For now I am just hoping to make the car run and then move forward as I go. Hopefully someone is kind enough to help out. I don't want to hook up the wrong wires and fry the PCM or worse. Thank you.

[Catmaigne]

I have the LT1 in car, car was originally TPI. motor mounts hooked up, fuel lines done, P.S lines done, etc, etc. All wires are hooked up except C100, C105, C210, C220 and C230 connectors. On to wiring. I have tried looking at schematics, lt1 swap start to finish thread at thirdgen org, lt1swap com, wiring for dummies thread thirdgen org, etc and I dont grasp some things well but I think I am very close. IF I understand correctly this is how i will wire my 97 LT1 from a T/A: PLEASE correct me if I am wrong.

LT1 C100 PIN A PINK pwr feed from injector #9 run to C207 PIN G wire at my 87. This will feed pwr to 4 of my injectors

LT1 C100 PIN G PINK pwr feed from IGN (this is something to do with ignition, not sure what) run to any factory switched pwr wire PINK on my 87?

LT1 C105 PIN B PINK pwr feed from Injector #10 run to C207 PIN B wire at my 87. This will feed pwr to my other 4 injectors

LT1 C210 PIN C ORNG pwr feed from PCM run from this to C100 A4 wire at my 87. This will feed pwr to PCM

LT1 C210 PIN A PRPL thft deter relay to starter I believe I will run a wire from this to C100 B4 wire on my 87. This will power my starter

LT1 C210 PIN D RED fuel pump feed run from this wire to C207 PIN D wire on my 87. This will pwr my fuel pump

C220 PIN E PINK pwr feed from PCM IGN run from this wire to a factory switched pwr wire on my 87?

C230 PIN G PINK pwr wire for an engine sensor? (not sure what this is for or where to run it)

I understand I would still need to wire ALDL and ALT. For now I am just hoping to make the car run and then move forward as I go. Hopefully someone is kind enough to help out. I don't want to hook up the wrong wires and fry the PCM or worse. Thank you.

That all looks right.
You can view all of those connector pins using the tabs at the bottom this page :
http://shbox.com/1/harness_connector_faces.htm

For the alt small wire, I believe you will need to run it through a 470R resistor to a switched 12v source. I would double check on that one though.

[JOATMON]

I looked up the LT1 connectors you had questions about in my '97 manual.
C100 Pin A is the 12volt feed to ALL the injectors(hot in run/start)
C100 Pin G is the 12volt feed to ignition control module, ignition coil, crankshaft position sensor(hot in run/start)
C105 Pin B is the 12volt feed to all four O2 sensors, MAF sensor, reverse lock out and skip shift solenoids if it's a manual. See C230 Pin G notes if its an automatic. Hot in run/start.
C210 Pin C is the 12volt feed to the PCM at connector C2 pins 15 and 31(hot at all times)
C210 Pin A comes from the theft deterrent relay to the starter solenoid
C210 Pin D is the fuel pump prime/test wire. It bypasses the fuel pump relay when you apply 12volts to it. (87a contact(NC) to 30 contact which feeds 12volts to the pump.
C220 Pin E is another 12volt feed to the PCM at connectors C2 pin 30 and C4 pin 3 (hot in run/start)
C230 Pin G is not used on manual transmission. On automatic transmission it is the 12volt feed to the brake pedal switch that unlocks the torque converter. (hot in run/start) The opposite side of the brake pedal switch goes to C230 Pin H which goes to the PCM C3 Connector pin 14(brake switch signal) Here is the tricky part, if it's a automatic transmission harness this pin is fed 12volts from C105 Pin B via the S104 hotwire splice.
Not sure how much of the LT1 harness you're using, but I can probably help.
I learned that the '97 wiring is slightly different than all the other year F-body cars.
Nolan

[NEKansas]

Thanks for the replies gents. Very helpful info from both of you. My LT1 harness is from an 4L60E auto car. So with this new info from you all my wiring would look like:
LT1 C100 PIN A pink run to C221 PIN A (even inj) or D (odd inj) at my 1987. OR if that wont work, any switched pwr source hot with key on & RUN such as C100 F4 / C100 A4 at 87. This will power ALL 8 injectors

LT1 C100 PIN G pink run to C100 A4 / C100 F4 at my 1987. This will be switched with KEY ON & RUN powering coil, ICM, CPS

LT1 C105 PIN B pink run to C100 A4 / C100 F4 at my 1987. This will power ALL O2s, MAF

LT1 C210 PIN C orange run to? any constant 12V at my 1987. This a power connection at PCM for pins 15 and 31 at the black PCM connector

LT1 C210 PIN A purple run to C100 B4 at my 1987. This goes to theft deterent relay, this will feed my starter power

LT1 C210 PIN D red to C207 PIN D at my 1987. This is fuel pump prime / test wire. This is one way to get power to fuel pump, I can wire it to a toggle switch or utilize my 3rd gen FP relay.

LT1 C220 PIN E pink to C100 A4 / C100 F4 at my 1987. This is another power connection for PCM at BLACK PCM connector for pin 30 as well as PCM connector C4 BLUE pin 3

LT1 C230 PIN G to? any constant 12V at my 1987. This will power brake pedal switch that unlocks tq converter? I believe that is all i have to do for this specific connection?

Still have yet to look into ALT wiring, thanks for the heads up on the resistor.

[JOATMON]

Hey, I don't have access to the '87 wiring diagrams so you're gonna have to figure out that side.
I forgot about the alternator sense wire, IIRC it seems like it came from the PCM. I'll check this later tonight or tomorrow for you.
I'm babysitting my granddaughter for a while this evening, so that takes priority.
Nolan

[JOATMON]

Ok, I checked and my memory was INCORRECT on the alternator wire. The vin code K 3.8 alternator setup uses the PCM to turn on the alternator.
The vin code P 5.7 alternator DOES NOT. My bad memory on that.
The wire which is actually supposed to be red according to the GM manual(I think it turns brown from underhood heat) comes from terminal "L" on the alternator to the C220 connector on pin A and goes to to a 470 ohm resistor in the instrument cluster exactly like @Catmaigne described.
On your '87, if you have a voltmeter you may need the resistor which may already be there in the form of a resistance wire.
If it has an idiot light and no voltmeter the resistance of the "charge" lamp should be sufficient for operation.
You can confirm this from your '87 diagrams.