I did have you test the a/c switch and the a/c thermostat indirectly by checking for ground on the blue/yel wire at the pressure switch.

Starting on page 23-14 of the 94 shop manual, it shows the locations of all the grounds.

Disconnect the battery and unbolt G1, G2, G101, G201, then G301. Use sand paper and/or a wire brush to clean the washer/threads of the bolt. Also clean any bare metal to ensure you have a good ground connection. A weak ground can cause strange problems.

The next step if this was my car would be to unplug the pressure switch and remove the a/c diode. See if the problem goes away. You know where the pressure switch is located. The a/c diode is way above the driver's side fuse box and has a red/wht and the grn wires going to it. Look at page 22-4 of the shop manual.

 

PA: Will unplugging those two and seeing if the problem goes away actually narrow it down to that component? Maybe Im not looking at this right, but wouldnt that be the same as removing a fuse from a circuit to see if it fixes a problem? Isnt it going to just stop the a/c compressor from coming on at all by removing one or both of those?

Or are you doing this to rule those components out of the possible culprits?

 

I'm trying to isolate some of the wiring sections. This is different than pulling a fuse, because you already should have the fuse pulled (the a/c turned off inside of the car).

This will isolate the temp sensor A circuit from B5 of the ECU. This will also isolate the a/c switch and thermostat.

I'm just trying to give you some free tests to try.

 

Pa. Im sorry I didnt mean to doubt you, I was just trying to understand what the test was doing. I will check both of those soon and report my findings, thank you again.

 

Ok. I tested it with the diode unplugged by itself. The ac switch by itself. And with both unplugged and the problem was still there each way. And the diode tested good while it was out using my meters diode checker. Im going to pull the ac switch next.

 

Ok I can confirm that it happens with the ac switch unplugged also. So its not the ac switch, the ac diode or the ac pressure switch

 

Thanks for not doubting me.

This problem is really frustrating me. Somehow you are getting a ground signal to the compressor relay that should not be there.

Send a PM to TexasHonda to give you some better suggestions, because I am out of ideas. Somehow the grn wire that is grounded is causing the red/blu wire to see ground. Did you clean up those grounds? Is there any evidence of an accident where the wiring was modified? That would have to be near the a/c condenser fan relay.

 

PA: No I havent cleaned the grounds yet, it got real cold and I didnt want to get sick again like I did the other night working in the cold. I noticed something that is probably completely unrelated but I thought I might run it by you. I was working on getting the idle right again and when I went to pull the fuse to clear the memory I noticed a harness plug that had two burnt looking terminals. This was on the under hood fuse box. If I remember right it was a 5 wire white plug, and I tried to trace the wires and it looked like they ran into the cruise control module, but Im not sure. They might have ran into the main harness.

As far as accidents or any modified wiring the only thing that I know was done was one of the previous owners installed an after market alarm that I pulled out when it got stuck in the alarm mode one day and wouldnt shut off. Other than that I dont know of any modified or damaged wires other than what I mentioned above.

If you want I can try to get the wire colors to maybe narrow it down as to what the plug is.

UPDATE: Ok, I got a better look at the wires and plug I mentioned above. I was wrong it is only 3 wires and they are kind of burnt so its hard to tell exactly what colors they are. From what they look like it is a Black/yellow, a black, and a green and orange or might be green and red. And they lead from where the plug plugs into the fuse panel into a larger harness just below. The plug itself is just to the right of where the main pos and neg leads are, and it is directly below where it says Honda PA66 on the fuse panels plastic case. It looks like maybe there was a short there at some point that started to burn the wires and melted some of the plugs plastic. I doubt this is anything, but its worth trying to figure out what this plug is to see if it possibly has anything to do with the A/C circuit.

UPDATE: Ok, I added a pic of a fuse panel to show you where this plug and wires are.

 

That connector is part of the electric load detector (ELD). My wiring on my old 95 looked bad too. I never got an ELD code, so I never bothered with it.

Clean up the grounds when you get a chance.

If that doesn't work, I would start following the red/blu wire from the compressor relay to see if there is any damage to the insulation of the wiring.

 

I tried to see as far as I could with the wire to see damage, but it goes from the relay into the car body, so not easily traceable. Im going to PM Texas like you suggested, maybe he has a new idea.