Hi all,

I've tried to find a diagram for components behind the dash (particularly the air conditioner vents and ducting, variable speed fan, and other sub-assemblies) but no luck. If anyone knows where else to look would be appreciated.

Cheers!

 

http://shbox.com/1/hvac_vacuum.jpg

I was able to find this nice resource. Still searching for a reference that shows component location in the dash etc.

 

There's a lot of info on component locations in the 1994 factory service manual. Free download, courtesy of member GaryDoug:

https://www.mediafire.com/?40mfgeoe4ctti

 

Hi Fred,

I went to that link and found the pdf but it's a dead link 🙁

 

I just clicked on my link in post #3, opened the list, scrolled down to 1994-SvcMan-bookmarked.pdf, clicked on it, and it downloaded and opened. Its a 141MB file, and can take a while depending on what you are connected to. Maybe something in your system timed out.

Been using that site for 5+ years and never had a problem, never had anyone I told about it come back with it not working. The owner is a member here. Try again, and if it still doesn't connect I'll ask him look into it.

 

You're right man, I was on a secured network that most likely is blocking the download. I'll give it another shot once I'm back in town. Thank you for the reference!

 

Is there something specific you need (as indicated in your first post cover it all?), or a specific problem you are trying to solve? It’s possible I can post a .pdf of the page or pages you need.

When is comes down to specific pies and part #’s, the “exploded view parts diagrams" may be more useful. They are in the same link I posted above.

 

I just went and recovered it after it had been sitting for 5yrs and slowly going through R&Ring fluids and components in a stock restoration when I'm on days off. I have an aftermarket AC in the vehicle. I still have the AC problem I did years ago (no power to the compressor). My OP isn't related to the AC no power to the compressor issue, but my blower motor sounds "weird" whenever it's on, like either it's working too hard, or something is caught in it. This has been prevalent for years as well. I just wanted to see what the duct routing and baffle locations were in the event I get under there and start tracing lines.

Once I get through some other general maintenance, I'll probably attack the AC problem full on, and take several good quality photos of the system that is installed, and see if I can come up with a proper troubleshooting matrices.

 

Did they make any effort to integrate the "aftermarket" A/C with the factory controls system, including the PCM connections and replacing the base heater HVAC control panel with the full HVAC panel? With the factory control setup the PCM will not let the A/C compressor activate if the refrigerant pressure is too low, or the evaporator temperature indicates possible freezing conditions.

The factory service manual has separate sections for heater only (section 1A) and for full HVAC system (sections 1B and 1B1).

Section 1A has a troubleshooting chart for a noisy fan. I've attached those pages as a .pdf

 

I'm not entirely sure yet. I'll be looking into it Wed, and Thurs when I get home. I'll walk down the whole system and capture visual documentation where available. From years ago, on this forum I'd investigated this issue and noticed that none of the relays, wiring, or terminals were present in the drivers side location, but were mounted on the passenger side shock tower location. I'll get new photos of this, and all other parts of the system to see what we're working with. Considering the system was low on refrigerant years ago, and MIDAS serviced it and reported it has (had) no leaks, I'm suspecting that the low pressure switch could be a root cause.

I haven't done enough reading yet, but if the system is installed anything like the factory, and integrated with the PCM, what does it take to reset it after a low refrigerant condition? The car had a completely dead battery for years, and I recently replaced it when I went and recovered the vehicle from where it had been stored for 5 years. When I started it to load it on the transport, it still didn't have a functioning AC (just blowing air) and I'm suspecting that the compressor is still not receiving power from the single wire that is ran down to its location with a quick disconnect connector in-line. I'll have alot more data in a few days when I'm home.

 

Shoebox haas the 1995 A/C compressor control diagram. 94 should be the same except they changed a couple fuse assignments around, but not sure if that affected this diagram.

http://shbox.com/1/hvac_compressor_control.jpg

 

If my installation resembles anything like the diagram you've shared then I'll have Autozone check for DTCs prior to performing any troubleshooting.

Thank you for the resources, these are fantastic!

 

Not a lot of auto parts stores seem to have the required OBD-1 code reader.

 

I'll ask and if not I'm betting I can probably buy the tool somewhere.

 

Code scanner, real time data reader, data logger, software, works on PCM, ABS, SIR - written by a member here, free download, you supply the cable:

https://www.camaroz28.com/forums/com...95-lt1-874306/


You log it, post the data log, and I can review it for you. If you want to learn more about the PCM scan data, check out my guide:

https://www.camaroz28.com/forums/com...-guide-886891/