I am replacing cluster and am trying to figure out what these two wires go to. I believe to the Icvr instrument cluster voltage regulator. One is black and other is black with green strip I believe they come from same pin #14. The black with green has a single silver wire and other is black with copper wire. I am missing a large portion so I can't connect the black and green wire back to the harness. Any suggestions on how to connect back together. The copper wire one won't be hard to reconnect.

 

Looks like some one has already been deep into the wiring harness. The cloth tape and multi crimp connectors is a tell tell sign. Sorry I do not know the answer so here is all I have, hope it helps. With or without (4) gauges or 2 and 2 (2 gauges 2 warning lights) matters.

 

Definitely helps understand better what I'm looking at. So I believe it to be the resistor wire. I just don't have a clue what it looked like originally. If anyone has a photo of those two wires and how they should be Id greatly appreciate it.

 

So looks here like the black wire terminates into a harness, which I was already thinking. The black and green looks like it's going to a splice/connector or pin. So, I'm assuming the black and green wire is a resistor wire of sorts? I'm not very familiar with wires, honestly. is that something I can just find at an auto parts store in the wire section? Also, how would I connect them as I tried to solder them already, and the solder was not sticking? It could have been my terrible soldering skills, though.

 

resistor wire is pink

 

This one says resistor on it. The rest said do not cut or splice I believe.

 

Ignition resistor wire is Pink (more like Puke Brown sometimes!) but apparently this one is an accessory resistor wire.
I never realized (or just didn't remember) that there was a resistor in the instrument circuit. But yes, Black w/green is ACC power from the ignition switch, and that one in particular is most likely to be the input to the IVR.
Maybe Ford started using the resistor wire when they started using PC boards/film on the back of the clusters? I'm more familiar with the Broncos, which used the old school round clusters with full wiring. Not a printed-circuit film in sight!
Easy enough to test them when it's together and the battery connected. When it's apart? Not so much...
But you can still see transitions with an ohm-meter between the key being OFF and in either ON or ACC I suppose. Anyone know how to verify, other than an ohm-meter?

Paul

 

Awesome, great information to know. Could I bridge the two wires with stranded wire or does it have to be solid/ single core wire as well. Also does that me the other black wire on the exact same pin would Acc power too I can't seem to find the other end of it. I saw a list from an old thread that the black wire was capped. But have heard from someone else “That black wire (I assume they meant black and green) is a resistor wire. It gets 12v from the keyed hot source. Should be another black wire in the same cluster pin that is also an IGN hot. That resistor/rubber coated wire feeds the temp gauge through the plug & printed circuit.”

 

I would not splice them together for any reason at this point. Judging by the diagram, that resistor wire is just taped up in the harness. Not sure exactly what yet, but my "assumption" is that the Black resistor wire was used with warning lamps, and that the Black w/green regular wire was used with gauges. Did you say what your cluster has? I hate assuming, but sometimes ya just gotta start somewhere.

But the Black w/green wire is normal wire at this point in the harness (judging by the stranded copper), consistent with the diagrams, and is simply connected to the circuit board connector at one end, and to power from the body harness at the other. Where there is a resistor, or resistor wire, further up the harness under the dash.
But just so I have this correct, the bare end you showed in the above picture, is already pinned to the main cluster connector, with just this 10 or 12 inches of harness, and just waiting for a connection at it's chassis/body side?
The pictures in post #1 make it look like they are taped together and in the cut harness that is attached to the connector for the cluster.

If it's already pinned and is separated from the chassis wiring, then you need to find the other end of a Black w/green wire to connect it to. The bare end of the resistor wire is theoretically not used in your case, with gauges. Was it bare like that already?
Did you find it down inside the tape? When you first opened it up, was it bare like that? Or was it covered, terminated, or otherwise protected from shorting out?

Paul

 

My cluster has gauges

Temp gauge still waiting to be installed

Yes the wires are pinned on the same pin on cluster connector and just waiting to find the wire on the other side of main harness

When I first found it it originally had a t type connector where the stranded wire started at the cluster connector and I believe terminated in the t connector and the resistor went from main harness to cluster

 

When I turn key to ign I get power to the main harness side of the resistor wire as seen with my test light

When I touch the cluster resistor wire to it the test light lights for both cluster plug wires as they are on same pin. I guess I need to attach both ends of resistor wire and find where the other wire plugs to? I was having working gauges before so I have new backing plate circuit and have tested gauges to work. Maybe this would solve that problem.