I am in the midst of my LS1 swap. The engine is in, HAWKS are on (nice looking, but they destroyed my ground clearance!), wiring is next. I have a few things I need to set straight.

The C100/power distribution connector. If I have this correct, the RED A4 pin is battery power (constant), PPL B4 triggers the starter, and PNK F4 is the ignition power. So, once the key is in the run position, I can use F4 to feed the fuse box for all that I need?

In the following pic, what are A,B,C, and D? I know, I know, I should have labeled them. I think they are..

A - Wiper control
B - ?
C - Fuel pump relay
D - Some other relay, or vise versa



Thanks for your help

 

I think "a" is actually the electronic spark control module. one relay is the fuel pump, one is the cooling fan, I'm not sure what the other part is.

 

You should have 1 fuel pump, 1 primary fan, 1 secondary fan. Thats my guess... You may have to trace them out.

 

assuming it's a TPI car.

 

Yes, it is/was a TPI car.. an 89 Formula.

Can't trace it easily, the harness is now lacking most if not all TPI related wires. It seems in my fragmented work schedule, I have forgotten some things and or a label has fallen off here or there.

I'm going to use a 4th gen fuse/relay block so "c" and "d" are not crucial, but I think "a'' and "b" could be. Is "a" the headlight module?

 

I was going to say your 89 will have all the necessary fuses/relays to keep from using a separate fuse block

With the 4th gen block, you can remove all of those. It will have sufficient relays to support the engine and components. For future reference, the relay body made little difference on function. You can rearrange the 3 and as long as something is plugged into them the function of each component will be the same

A is ESC

 

Can't all remember all the wires on the c100 connector that I mod'd. You may do a search and find out what goes where. Theres a buch of info on here.

 

One of those relays is the maf burn off relay

 

This thread has all year C100's
https://www.thirdgen.org/forums/ltx-...formation.html

The only mandatory wires are the two big red power wires and one big pink IGN

The rest are gauges or non-reused electronics

 

Thanks Pocket, I skimmed that at one point, but I never read the whole thing.

What/where is H02?
*EDIT* Is it in reference to the LS1 schematic you posted?

 

Newer O2 sensors are heated. Short hand is HO2 so they arent confused with the direct to ECM/PCM controlled older non-heated style

If you are using the 4th gen fuseblock, then t will have an IGN relay. You run the C100 IGN wire to power the IGN relay in the block. The rest of the wirng will have the proper fuses and connections to run the HO2s along with all the other electronics and sensors

 

Ok, so I was correct, the PNK IGN wire is from C100 to whatever needs it... relay or otherwise.