On a 87 iroc under hood their are 2 seperate plug ins that go to the firewall a big one an one that only has 7 pins to it what are the wires that are used in this an the colors if anyone knows. I trying to get rid of the wires I dont need. I went to carb. an dont need all of them. any help would be good. Thanks.

 

Are you talking about the C100 on the driver side splitting in 2 pieces?? If so you will need most of the wires on there and id leave them alone as if in the future you end up doing a LS swap or something fuel injected you will need them. Thats just my 2cents tho.

 

Here is a good site local to me. Alot of info. Click your year. Lmk if this helps...
http://berlinetta.info/C100.htm

 

If you want email me or call I can go over the wires out of my helm for 89 if you need to clarify. Small connector is the headlights foglights and such. Most important is the large red,purple and key on power pink from ignition. These power the whole car off the starter which is tied to battery. Most wires you wont reuse. Gauges to work you will need to keep things like oil pressure sender, coolent temp, voltage, fuel sender is seperapte under drivers side carpet near door sill. Tach is there but if you are running a msd you can tie it into that. The fat pink key on wire is the keyed 12 volt wire needed to trun on msd when you turn on ignition. Things like cold start, injectors, etc, that had to do with efi are not used. Lmk, take care.