A/C clutch wiring had been cut-off from ECM and AC switch

I am not sure I understand how he bypassed the clutch from the ECM but it still works. Do you mean he hard wired it so the button does not turn it on or off anymore? Basically the AC system is on all the time now so the clutch just keeps cycling?

Yeah he hard wired the clutch. He used and installed a manual thermo switch and that switch controls the cycling.

The current wiring from what I have observed is.

Battery -> AC relay -> mechanical thermostat switch -> AC clutch.

Okay. The way in which the compressor is engaged should not cause this whether that is a new switch or the factory switch. The engine bogging down like this is probably due to the compressor or the clutch.

Just to get on the same page, are you looking to put it back the way it was (undue what he bypassed) or are just wanting to solve the bogging down?

I suspect the way to fix this is replace the compressor. The compressor is "tied" to the crank by the serpentine belt so when this engages it bogs down the engine by adding the load to the crank pulley.

What this happening before he bypassed the switch or was the compressor not working?

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Thanks for the help so far KASEKENNY1.

But I'm not sure if its on the compressor. It was working fine before the bypass. No drop on rpm or anything.

Right now, my main target is to reconnect back my ac clutch to the ECM. So that the computer will bump the IACV to increase whenever the A/C clutch kicks in. I need to find the wires of my A/C clutch, A/C switch, and A/C pressure switch.

If the above isn't possible, then I have to solve the bogging down of the engine. Because, i'm afraid this would cause more issue to the engine if left unsolved.

Things I notice is that i still see a timely increase of rpm (150-200 rpm's) in like every 2 minutes as if the computer is thinking that A/C is still connected. But the increase of rpm is way to early since A/C clutch kicks in after 10-20 seconds.

Not sure why I didn't think of this before. The ECM knows when it is going to kick on the compressor so it can pump the idle if needed. Now you are just getting an added load to the engine and it doesn't compensate.

Is there a reason he did what he did? Why was it bypassed? I included the wiring diagram. We need to wire it back the way it was or take it back to him and have him undue what he did.

What was the issue before he did this?

Thanks. Will find the previous wires of my A/C.

The reason was totally unrelated to my current problem. I asked him to fix my headlight wiring since my high beam isn't working. He decided to cut some saggy wires, I asked if that will affect anything and he said no. I thought he knows what he was doing so I agreed.

Later on we found out that the A/C isn't working anymore. No lights on the dashboard A/C button and A/C clutch isn't engaging.

Any idea how I can test each wires to see if they are really for A/C system? I checked the wires earlier today and it's a lot of wire under the steering column.

You can test each wire but the way to do it is very cumbersome and not easy. Basically you have to check for what is called continuity from end to end. This will tell you if the wire is where it is supposed to be.

It can be done but if it were me, I would take it back to him and tell him to put it back the way it was so that you have the original issue unless the head light issue is repaired. I have no idea why he would decide to cut some wires out and then hard wire the A/C clutch. Does this person own a shop or was it just someone doing it as a side job? If they have a shop, I would take it back.

Otherwise, I will get you the complete wiring diagram and you will have to check continuity as I stated earlier. I am just trying to save you a major headache because trying to figure out what someone did without a wiring diagram is the hardest thing to do in automotive work. Wiring is complicated as it is when you have a diagram that tells you exactly what wire is where. Without knowing everything they did, you will need to trace it and that is difficult.