I am working on this (88 DX) car and I have basically been trying to fix the previous owners hack job on a B20 swap. I have 3 wires that I need help identifying based on location on car and color.

First pic is of 2 wires coming off my chassis harness near my ECM. They have been depinned from something and I am really not sure how to figure out what from.



2nd pic is from a wire that has been depinned and stripped from the driver shock tower plug. Dunno what its for.



Any help is extremely appreciated. I think I have most of the bugs worked out of this thing now but I still can't get it to run. I know one of the reasons is shitty grounds in the engine bay.

Also, what does 'ground to shields' mean in reference to the CYP sensor, et. al.?

 

Bump for me, I need help.

 

I think the ground to shields is the ground for the sensors that go into the dizzy maybe thats why your car runs shitty I would try and fix that first and the other wires could be injector wires (yellow)and main relay wire (black and yellow)

 

That green with black stripe at the very bottom should be for the rear wiper pump. Since you have a DX - does your rear sprayer work?

Top picture: Yellow wire - Plug position A8 - it is for Lock-up control solenoid valve - used for automatic transmission. So check your A8 and see if there is a pin missing there.

Grounding to shields means that there are several wires in your harness that are enclosed in a wire shielded cable (think coax cable...) that shield is grounded. I am assuming it is for electromagnetic interference, as usually with shielding. Two shielded cables I am seeing by my ECU are thicker brown, and really thick orange. Wires inside have different colors.

 

The main relay works, the injectors are spraying so the two wires do not control any of that. The rear sprayer doesn't work last I recall. I'll check it out today, thanks for an idea!

 

The black w/ yellow is probably a +12v, and probably leads to a jumper where ther will be more black w/yellow wires. The yellow could be for EGR if it is at the ecu.