I got a new sending unit for my 1994 Integra because my temperature gauge was not working. That did not fix it. I noticed a loose wire hanging by my feet I traced it and it lead to the sending unit. I found cut wires that are the same color too. I need help figuring out where the green wire from the sending unit leads too behind my dashboard.

 

There are three(3) ECT, [engine coolant temperature "units].

1- ECT sending unit, [for temp gauge] is a one wire unit, it is yellow/green, that green wire, [2nd pix] is not stock, and if the green wire in first pix is grounded, that is wrong also, grounds are either black or brown.

2- ECT switch, [for rad fan] is a two wire unit a black and a green, the green lead runs from the switch to the rad fan relay in the engine bay fuse box.

3- ECT sensor, [for ECU/ECM] is a two wire unit a red/white and a green/blue both run the the ECU/ECM.

So question is, which one did you change?94

 

It's pin#13 on connector D of the ECU.


if this is for the dash sending unit....good luck

 

Those wires aren't grounded they are just fed through and cut. Unfortunately it is for the dash sending unit, I traced it out of the firewall to check(my temp gauge not being on helped to tell too). Does anyone have a clue where the end of the wire goes? all of the wiring diagrams and stuff i find dont really help much.

 

On the cluster look at the plugs and find a green one that matches then run a direct wire I had to do that when I chopped my engine harness up .

 

So the black and green leads in the first pix are not grounded to that bolt?

Are you saying someone replaced the stock yellow/green sending unit lead with tat green lead???

The stock, [yellow/green] ECT sending unit lead is part of the engine harness that connects to the dash harness, [at pass shock tower] and runs to the cluster plug(s), what you have there is not stock. 94

 

Still unsure if this is for his ECT(as 2 wires are loose) or the sending unit which is a single wire, he says his temp gauge isn't working either.

 

Well to be a lot more detailed I traced the green wire from my sending unit it led through my firewall and to the floor (2nd picture)The first picture is the back of my dashboard i pulled it out and looked for a green wire that was cut. I found two green wires and a black one that are not grounded they are just fed through (they are not attached to the harness). So i guess really i have two questions where does the sending unit plug into and does anyone have an idea what those cut wires are for? I appreciate the help btw!

 

Also I tried to run a direct wire but none of the wires plugged in are the same green as the wire from the sending unit??

 

afaik the sending unit goes to one of the wires of the gauge cluster plugs as for the ECU one goes to the #13 pin on the D connector of the ECU and the black is a round so afaik it can go anywhere.