Engine wire grounds help for custom project

[shomethe$$$]

I'm currently doing engine grounds for my prelude project, here is what I got so far

1. Rear pass engine, intake support stud TO strut tower nut I think
2. Small wire off Neg battery cable TO front chassis support
3. Starter bolt on trans TO neg battery cable

I think i'm missing one near the relay control module and the radiator fan, please help, searched

 

[Off Road SHO]

Well, if what you're trying to do is use a SHO motor in something else, and you're using the stock PCM, it's fairly straight forward. All grounds in the SHO's wiring harness are either black or black with a stripe. Out of the PCM, pins 20, 40 and 60 are grounds. The block has a ground in the center, next to the knock sensor. The wires that go between the Crank sensor, the cam sensor and the DIS are shielded with aluminum foil with a bare drain wire, that bare needs to be grounded. The block is also grounded at the negative cable attachment point which is one of the starter's bolts.

When I did The Other Woman, I didn't rely on the frame as a ground transport path; instead I ran each ground all the way back to a grounding plate that the DIS, PCM and relays were attached to.

So, what's your custom project?

Tom

 

[shomethe$$$]

thanks, what does the bare drain wire look like? what about the other grounds I mentioned, I'm talking about only the external one's...its a SHO motor inside a Honda

 

[Off Road SHO]

It's bare and wrapped up inside of the aluminum foil shielding. I forget where the bare is attached to the other grounds.

The multiple ground locations is used to keep current from building up in long ground wire runs and causing a flow of current. If it's black or ends in a serrated eyelet, run it to ground.

Tom

 

[SHOZ123]

Get a ground block from an electrical store and run all the grounds to this with copper in one form or another.

 

[shomethe$$$]

wait a sec, forget the internal grounds, when I took the engine and trans with entire wiring harness out of the original 93 MTX, I only unbolted a few grounds, the one's I mentioned, but I think I'm missing one near the radiator, shouldn't be more than 4-5 grounds, right?