90 CRX Si, B18A1 swap in progress

Starter is good, if I jump the terminals it fires right up.

Not getting power to the black/white starter solenoid wire when turning the key.

I built my own engine harness, and it has continuity from one end of that wire to the other.

DMM on the back of the key cylinder shows 12.4v on the black/white wire.

DMM shows 12.4v where the black/white wire enters the under dash fuse box/ICU.

On the back of the fuse box/ICU there are two (2) large black/white wires. One is near the middle and next to a red/blue wire and continues on to the cabin harness from what I can tell. The other is near the top left corner of the fuse box and goes about 8 inches before it splits into two (2) wires, which go about another 6 inches and both go to this plug (it doesn't reach anywhere and I can't see anything it should plug into).....




The one near the middle on the back is the one that I though was the starter solenoid wire, but it has no power to it when the key is turned to the "start" position. The other wire near the top corner however get 12.4v when the key is turned to "start". There is also no power at any time to either side of the #2 fuse (10A, starter signal) in the fusebox.

1. Am I correct that the #2 fuse goes to the middle black/white wire that is getting no power? If so, I would assume my problem lies within the ICU?

2. What is supposed to plug into the pictured plug? If it isn't anything to do with the starter, why does it only get power with the key turned to the "start" position?

I've been looking to see if anyone has posted a pic of the back of the under dash fuse box with a list of what each wire is for, but I've only had luck finding the map that's printed on the inside of the dash panel.

 

I'm going to run a 12 gauge wire from the clip in the pic to the starter and see if it will suffice, but I'd much rather do it the right way if anyone has a clue.

 

Ran that wire from the plug in the picture to the starter solenoid and it works fine without blowing any fuses.

However, I'd really like this fixed properly, so help would still be appreciated.

 

The plug goes plugged in to the back of the fuse box.

If you look at the fuse box you will see 2 nuts holding on to the top of the fuse box. Take them off with a deep socket 10mm and you should be able to pull it off the bolts on there and get access to the rear of the fuse box. Just find the area where that plug goes and you should be good!

 

I didn't see anywhere for it to plug in, but I'll check again.

 

That plug can't go to the back of the fuse box, the power that is in that plug comes from the fuse box.

 

Looks like a relay goes on there. There's a relay that goes inserted to the back of the fuse box. It inserts to one of the holders that are on there. So it doesn't dangle around.