I am helping a friend throw a 87 305 tpi with an auto trans into a car that was a 88 2.8 with an auto.
Pulled 2.8 engine harness out of engine bay and installed the tpi harness, by the pass kick panel there is 2 plugs that go to the computer 2 kinda of clear that also have a home and are connected but there is one mystery plug in that same cluster that doesnt have a home? what I am wondering is where do the wires go? I have a manual and can not find the wires anywhere. It is a light pink with black stripe, dark pink with a black stripe and a tan or orange with a black stripe.
interior harness is still 88 2.8 original donor car is long gone, so I can not check to see where the connector ran. thank you for any help or diagram to show me where they need to go.

 

Its the C221

Two pinks are INJ1 and 2, move them to C207 pins B and G respectively. The red wire on pin B is not reused, G should be empty

Tan is fan fuse, move it to C207 pin D

The large C207 D wire removed is fuel pump 12v, it will have to be connected externally back under the dash. In 88, it was moved back to the C100 which you wont have a terminal for, so run it under the dash and connect it to the fuel pump wire wherever you find it

 

first of all thank you, I checked out a couple of your other post and they are extremely helpful! :-) my no longer mystery plug only has the two pinks in a and d and a tan in c, I will head over to move the wires sometime later today, the 88 interior 207d should be the fuel pump lead and the 87 end from the engine harness will just be a empty pin if I understand correctly? so I should just have to run a wire with 12v's when the key is on to power this?
The problem I am trying to chase down is I have spark, but no fuel or ignition toggle, replaced ignition module with a known good part, but I am guessing that the wires not hooked to anything has a good probability of being the cause!

 

Ill clarify

You're moving stuff around on the 87 engine side because its easier

Pull pins B, D, G out of the C207. Pins B, G are not reused no matter what they were. D is fuel pump, so locate the fuel pump wire from the rear of the dash side C100 and Tee in some where, or run it all the way back to the tank

Next, depin all the C221. C221 A goes to C207 B, C221 D to C207 G, C221 C to C207 D

That should get your injectors and pump working