Air Conditioning Problems... Reply #15 – February 18, 2006, 03:36:39 PM My '85 Manual shows the BK/Y wire to be 12V. The other must be ground.I use a motorcycle battery and use wires terminated with alligator clips to apply 12V and ground to the terminals. Quote Selected
Air Conditioning Problems... Reply #16 – February 18, 2006, 03:56:16 PM I already ran a line from the battery to the Black/Yellow wire without any difference. Are you saying I have to run a line from the battery to that grey wire as well? Quote Selected
Air Conditioning Problems... Reply #17 – February 18, 2006, 04:02:46 PM Not to the wire, but to the clutch terminals themselves. Doing so rules out any shorted/open wiring issues. Quote Selected
Air Conditioning Problems... Reply #18 – February 18, 2006, 11:40:59 PM Mr DMC you have two male spade terminals on your clutch. One is power (black/yellow) and the other ground (black i believe) Run power and ground bypassing all other wires, this is just testing the clutch. You have said that you had the clutch engage before. But it would only stay on for a few seconds? Correct?You probably don't have a problem with your clutch if it has engaged. I'm guessing that your WOT relay is the problem.But DO check the clutch directly.Let us know how it turns out this is getting kinda fun. Quote Selected
Air Conditioning Problems... Reply #19 – February 18, 2006, 11:55:14 PM Kinda Fun!!??? For you maybe, but here in Tucson, Arizona, having a properly functioing Air Conditioning unit is very serious. Law Mandates it in the summer. I know it has probably confused a lot of you guys in other areas of the country why I'm so concerned about my Air Conditioning in the middle of winter, but you have to understand where I live, there hasn't really been a winter. I hasn't rained measurably since August 2005, and for a majority of this "Winter", temps have been in the mid to upper 70's. Not only that, but there is no real "Spring" time around here. When winter ends (Seeming over night around these parts) sometime in March, temps shoot straight into the upper nineties. I've got to be prepared. If I do ever get this problem solved, I'm really worried about the effects the air is going to have on the performance of this car. The air bogged down the V6 somewhat, and I can only imagine what it's going to do on this 4 banger. Quote Selected
Air Conditioning Problems... Reply #20 – February 19, 2006, 07:21:48 PM Ok Guys. I'm going to lose it soon and I need some help. I cannot for the life of me get the wire harness off of the Compressor. I have yanked, pulled, used Plyers, etc, and I'm afraid if I continue this I'm going to break something. Obviously I can't run the 12v to the Terminal itself unless I get this harness off. What in gods name do I do??I'm just about to the point where I'd be willing to take it in somewhere to have the compressor tested....I don't want to do that, but I don't know what to do anymore.And for god's sake, what is the "WOT", where is it, and how would I replace it???? Quote Selected
Air Conditioning Problems... Reply #21 – February 19, 2006, 07:36:30 PM The connector looks like this...Just push the tab outward and pull back to release. (Always sounds easier than it actually is)Wide Open Throttle = WOTAccording to Probst, your WOT A/C relay is located in your IRCM. Quote Selected
Air Conditioning Problems... Reply #22 – February 21, 2006, 08:40:53 PM Ok, let me try to explain this in the simplest terms possible. Ok, I did finally get the Connector on the compressor to come off. After hooking the battery up to the compressor directly, the clutch DID engage. At that point I was overwhelmed with joy that the compressor was NOT fried. So, quickly I hooked up an R-134 can to the Low side port and began to attempt to recharge the system. HOWEVER, after a while, it became apparent that the system was not sucking in the R-134. The cans were not getting cold, and the air was blowing hot. Turns out that the Adapter on the low side port was too big and no Gas was being sucked in. After buying the correct adapter, and hooking up the R-134 can again, it did start sucking the stuff up. The air was getting colder. After one can, I could tell the difference. However, this is where it gets weird. After finishing the first can, we un-did all the Bypassing stuff and tried hooking up the Connector to see if maybe the pressure was preventing the Clutch from engaging. No go. The Clutch still wasn't engaging. But even stranger was that we attempted to Bypass the system again, but this time by using the Cycling Switch Wires (what I did in the beginning, but didn't work...) and guess what.....it worked! For whatever reason, when we connected the wires, it engaged the Clutch. It didn't do that before remember?? The only thing that was different from the first time I tried that was I hadn't added any R-134, and this time I had put in 1 can. Never the less, I have arrived at this point in timeI added two more cans, and the air is Very cold. However, the clutch still will not engage on it's own. I have to bypass the system using the two wires on the Clutch Cycling Switch over the Dryer. Now, obviously I have a problem, and no, I don't intend on bypassing the system every Summer day, so what now? What could the problem be? The Clutch WORKS, but it won't engage without bypassing the system. What next? Quote Selected
Air Conditioning Problems... Reply #23 – February 21, 2006, 09:35:30 PM Looks like you need a low pressure cycling switch. They run ~$15.It is as simple and unscrewing the old and and screwing in the new one. Quote Selected
Air Conditioning Problems... Reply #24 – February 21, 2006, 09:40:43 PM Ok, explain to me how you have come to that conclusion? Quote Selected
Air Conditioning Problems... Reply #25 – February 21, 2006, 10:17:04 PM Um I would just trust him, thats what I say you need too. Quote Selected
Air Conditioning Problems... Reply #26 – February 21, 2006, 10:23:00 PM Ok, I just don't want to be throwing money at a problem when I'm not certain it will be the fix. Where would I find one of these Cycling Switches? Local parts store? *Gulp*....ebay? Quote Selected
Air Conditioning Problems... Reply #27 – February 21, 2006, 10:48:10 PM The Low Pressure Cycling Switch is an on/off switch that is open below ~25 psig. (~25 deg F with R12 / ~29 deg F with R134a)To engage the clutch, the circuit runs as follows - power goes through the A/C Demand switch ...then to the cycling switch...then to the WOT A/C relay...then to the power terminal of the clutch and to ground. A faulty (open) cycling switch will break the circuit and not allow your clutch to engage.You can pick up a cycling switch at any parts house. Quote Selected
Air Conditioning Problems... Reply #28 – February 22, 2006, 01:28:15 PM Well, thankyou very much guys. In particular, Mr.JeremyB. I changed out the Clutch Cycling Switch, and sure enough, the Clutch engaged. I now have Air Conditioning. Although I must say, whenever the Clutch does engage, it makes a rather unsettling rattling noise, but other than that, everything seems fine. I was amazed that how even with the A/C on, the engine didn't seemed bogged down. My V6 seemed to struggle with it on, but I couldn't tell the difference this time around! Quote Selected
Air Conditioning Problems... Reply #29 – February 22, 2006, 01:35:24 PM Sounds like you need to get a pressurized can of ESTER oil and add that to your system. Make sure you get the can that hooks up to your a/c hose and not the one that is just a bottle. R/12 was a natural lubricant but R/134A is not. Quote Selected
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