Hello,
I've done a lot of research but maybe I didn't use the correct words as I don't know the name for some parts (Gray boxes bolted to the chassis under the dash).
Here's the thing... I recently bought a cheap car and put an engine in it... the wiring inside of the cabin looks like a mess. When I hooked up all of the wiring my main relay isn't clicking, instead I hear a buzzing sound but I don't think it comes from the Main Relay.

Car:
Civic Hatchback 94 - Manual Transmission (P06 ECU)
D16Y7 engine
Y7 Dizzy converted to OBD1 (Re pinned the sockets)

Main Relay
Fuses are all okay... including #13, #18 and the one for the ECU and Back Up. I opened the Main Relay and it looks fine... I jumped 1/5 (KOEO) and also 1/7 and the fuel pump primes both of the times. I even tried a second main relay and the issue persists.

Grounds
I re-did the main grounds, I.e:
-Chassis to valve cover
-Chassis to bracket on top of the tranny
-Thermostat... I even ran a cable directly from the thermostat ground to the negative terminal of the battery.

There are 2 wires cut loose from the ECU but as far as I know both of them are for Vtec and I'm not using it, so I "guess" it's okay to leave them as is.
The ECU is good, I know it isn't burnt. The only thing that I haven't checked so far is the ground from the ECU wiring.

I've attached 3 pictures:
The first one shows a blue wire from a gray box that is T'ed to a green wire... I don't know what that gray box is supposed to do, neither the T'ed wire.
Also, there's a red wire hanging around that is grounded to the chassis using the bolt from one of these gray boxes.

The second one shows a gray socket with three wires. (Black with silver dots and two red wires with silver dots as well) One of those red wires is t'ed with a white wire... Those three look all messed up.
At last, theres another two cables hanging around. One of them is "white/red stripe (white looks kind of beige), the other one is Green/red stripe (Green looks like mint color).

Is there anything else that I should be checking?

 

Check dash fuse 24 and hood fuse 31. See FAQs sticky fo fuse box diagrams.

 

Hi RonJ...
I made a mistake when I wrote fuse #18... I actually meant dash fuse #24... it's good... hood fuse #31 is okay too.

 

Does the starter crank the engine?

 

Yes sir.. I already tried to run an extra ground wire to A1 and A7 from ECU and still no luck.
(I saw another thread where you asked a guy to run a ground wire to A7)... on D-Series forum they said that the wires could be from a previous alarm system that's no longer there (I can't tell, I got it like this).

I also tried disconnecting the MAP sensor... could it be that my VSS is broken and it's disconnected as well?

 

Do the ECU pin A7 ground test I mentioned here:

https://honda-tech.com/forums/honda-...n-off-3286513/

Does the fuel pump run?

 

Hey, I think that I have just found the issue... well, kinda.

I ran a cable directly from the negative post from the battery to the #1 pin of the Main Relay and now it clicks KOEO and the pump primes as well.
So far, I got the main relay working... I'm pretty sure that the ground wire from the thermostat is good, why am I having poor grounding on the main relay?

 

What is the wire color at what you are calling pin 1?

 

Black, which is supposed to be the ground. Right? Sorry, I messed up again... I really meant no. 2 according to the picture shown below.

 

You're having the same problem that this guy is.

https://honda-tech.com/forums/honda-...n-off-3286513/

Read the entire thread.

 

Hello RonJ...
I've been away from home for the past two days... I'll check that out and make sure the ECU and the thermostat ground are working properly.
I'll get back to you ASAP.

Thanks a lot

 

WHT/RED and GRN/RED wire pair is most likely for the dome light. Does it work?