AC pump wiring - NEED HELP - previous owner hacks?

[ErrorMargin]

With the engine out of my 1984 Targa I am cleaning up the engine bay and looking at all the wiring and I've found a few things that are raising questions:

1. Looking at the first picture below, is #1 the connector to energize the AC compressor magnetic clutch? If it is not, then what might this be? And what does the AC magnetic clutch harness connector look like? Is there any other wiring to the AC compressor or is it just this one connection?

2. In the second picture below, this black wire #2 coming off the connection to the AC compressor (from the first picture) wraps around the back of the car over to the engine bay fuse block where it connects to a relay installed by the previous owner.

Is the black wire #2 a part of the factory wiring harness? It looks factory and is tied into the connector #1 like it is factory...but I cannot find that wire in the wiring diagrams. If it is original, what did it originally do and where did it run?

Assuming #1 is the AC compressor energizer circuit, the relay was configured to trigger power to something (which is no longer there) when the AC system was turned on. Maybe a PO added a fan on the engine deck lid AC condenser? Whatever it was, it is gone but this wiring remains.

[76FJ55]

Where does the other black wire lead to coming of the relay opposite the red wire?

[ErrorMargin]

Originally Posted by 76FJ55

Where does the other black wire lead to coming of the relay opposite the red wire?

The other black wire is just hanging there.

Whatever it was connected to is no longer there.

My hypothesis is that, if #1 is the AC energizer circuit, then maybe they were using that relay to power an aftermarket fan on the AC engine deck lid condenser?

[wazzz]

I think this black wire going from left to right is not stock. I have just checked on my own car (88 Carrera) and there is no such wire running through the holes you showed in your video.

Not easy to guess what is what on your pics. Can you sketch a quick diagram with relay pin numbers?
I already answered in your other thread about this and I believe the relay is supplying power (from permanent power 3) to something that was connected at the opposite end of the black wire, not the black wire number 2 on your pic, but the other one that is going off the pic, probably to your dangling connector. So black wire #2 and brown would be connected to relay coil, while red (#3) and non-numbered black would be connected to relay switch.
Can you confirm this with a quick diagram?

As I said I checked on my car and the wire going to the AC compressor is green as per factory diagram, but it is enclosed in a black plastic sheath. On your first pic above, where is the fatter black wire leaving the top of the pic going?
The stock green wire from AC comp should be joining the other group of wires that come from the rear right light box (round plug) into the sheath opening that can be seen at the very top of the pic.

[wazzz]

Originally Posted by ErrorMargin

The other black wire is just hanging there.

Whatever it was connected to is no longer there.

My hypothesis is that, if #1 is the AC energizer circuit, then maybe they were using that relay to power an aftermarket fan on the AC engine deck lid condenser?

That's what I told you in your other thread. Not sure you have seen my answers about this point. I also answered about the other black/yellow wire that was tapped in to probably feed an overhead brake light.

[kuehl]

ErrorMargin,


"My hypothesis is that, if #1 is the AC energizer circuit, then maybe they were using that relay to power an aftermarket fan on the AC engine deck lid condenser?"
It could have been!

But you don't need it so cut off #2 where it exists the heat shrink at #1 and heat shrink the end you cut it so it does not short out. And, get rid of the relay and all its wires.

You will use the male spade inside of #1 to connect the compressor clutch wire.
#1 comes down from the AC Thermostat in the center console.

[ErrorMargin]

Originally Posted by wazzz

...Can you sketch a quick diagram with relay pin numbers?
...

The stock green wire from AC comp should be joining the other group of wires that come from the rear right light box (round plug) into the sheath opening that can be seen at the very top of the pic.

See below for wiring diagram with pictures. Given the comments here so far it seems everyone agrees that everything above the dashed line in the wiring diagram below is from a previous owner and can be removed.

My guess for the purpose of this wiring is to put an aftermarket fan on the engine deck lid AC condenser. I'm curious if anyone has a different theory.

My only open question is on the connector for the AC clutch energizer. Is picture 1 the AC energizer connector? If so, shouldn't this wire be green?

[kuehl]

Error,
"ac clutch bunny rabbit" wire you are discussing comes down from the AC Thermostat.
Check your AC Thermostat wire colors. You should have green/white and solid green.
Solid green goes all the way back your 'picture 1'.

Chances are the wire you a fumbling on is green with a black sheath to protect it.

How can you tell if this the wire lead you need to power the compressor clutch?
A) you could take a razor and cut back the black 'insulation' and see if there is a green
insulated wire underneath.
OR
B) If you have a fully charged battery you could turn on your ignition key to the 'on
accessory' position, turn on the evap motor fan speed switch to either of the 3 fan speeds, turn the ac thermostat knob fully clockwise, and test if you have power at the male spade inside the funky translucent dirty dark rectangular wire terminal in
your fingers in the picture; if you don't have power at that wire just refer to the schematic below and make it work!
OR
C) take our word for it, it is the bunny energizer wire you have looking for.

A car manufacturer does give a sign of what wire colors are in a schematic,
but if they have put a protective sheath over a wire they are typically not going to tell you the color of the sheath or protective on top.

schematic below:

[wazzz]

That's correct, green is enclosed in a black sheath.
My take on this is that PO cut off the original spade connector at the end of green and crimped a new spade connector in place so as to connect together the original green and the non-stock black wire running to the other side of car.

Spade connector is T1a on the diagram posted above by Charlie.

[ErrorMargin]

I validated that the green wire is in the black sheath. However I tried to turn on the system as
kuehl suggested to test for power at the connector but I did not get any power.

At this point I'm satisfied I have the right wire and will save troubleshooting this for a future project to get the AC system working.

Thanks for all your help!!

[wazzz]

Originally Posted by ErrorMargin

I validated that the green wire is in the black sheath. However I tried to turn on the system as
kuehl suggested to test for power at the connector but I did not get any power.

At this point I'm satisfied I have the right wire and will save troubleshooting this for a future project to get the AC system working.

Thanks for all your help!!

That's predictable. Since your engine is out of the car, so is the starter and its solenoid.
If you check the AC electrical diagram posted above, you'll see that the AC relay in the smugglers box is taking its ground (on terminal 86) from the yellow wire that goes to the starter solenoid (pin 50). This relay cannot trip and cannot power AC unless you put the engine and starter back into the car and reconnect the starter.

[ErrorMargin]

Originally Posted by wazzz

That's predictable. Since your engine is out of the car, so is the starter and its solenoid.
If you check the AC electrical diagram posted above, you'll see that the AC relay in the smugglers box is taking its ground (on terminal 86) from the yellow wire that goes to the starter solenoid (pin 50). This relay cannot trip and cannot power AC unless you put the engine and starter back into the car and reconnect the starter.

Makes sense, thanks!