87 TR A/C-HEATER STUFF

No argument from me that descriptions given in the TR documentation for those yellow light bars convey nothing about which way is closed and which way is open

However, I have visually confirmed that the more yellow lights that are "on" -- the more open the flaps are that allow some of the airflow into the footbox area, and all of the air that enters the TR passenger cabin (regardless of what vent it comes out) is temperature controlled (i.e., without modification, it is not possible to allow just fresh outside air into the cabin).

 

You are starting to give me second thoughts about buying a TR....................................

 

I'd agree that it was/is sort of a mistake design-wise to not have any way to vent in fresh air from the outside. When locked up on warm days (even with the windows cracked open), it would (and does in my case) help to keep the passenger cabin cooler.

But you're not alone -- every new TR owner (including myself) is surprised by the lack of a fresh air vent function. The 5-lug US TR can be modified fairly easily to provide this capability (assuming that getting into the central tunnel and doing some wiring mods at the ACU pushbutton unit is considered "easy"), but I'm unsure if the same modification can be made as easily to the single-lug US TR (since I don't have a wiring diagram for those). I do know that it is a more difficult modification on the early euro TRs (because you'd need to make wiring mods at both the AC pushbutton unit and at the AC unit under the dash), but if you can get a copy of the AC wiring diagram for your particular TR I'd be glad to give it a look over and see if the same modification would work for you.

 

No problem -- the hard part will be doing the work on your end

If your TR is a 1987 US version, I believe this (457/86) is the corresponding wiring diagram book:

http://www.ferraribooks.com/inc/sdetail/475

 

Agreed.
That girl in the picture definitely isn't from around here. All the ones around here can buck a 120 lb hay bale 6 feet over their head. I think I need to head south for another one one of these days. Nothing in the stable right now.

 

Yikes, Too rich for this blood.

........................Yeah yeah, I know, not in the game plan right now. Important Ferrari fish to fry.

Er ah, aren't we supposed to be talking about A/C or something?

 

No matter where you go or who you are somethings never change

 

I believe those schematics in the TR WSM section H are for the early standard/euro TR so the question still remains whether or not your '87 US TR is the same (I just don't know).

I haven't thought about this topic recently so some of the details are only now starting to come back to me. The modification I've implemented on my late US TR is one where (via an on-off-on DPDT switch) you have the options of:

1. only the flaps move (so you can let in fresh air)

2. the flaps move and the blower runs (so you can blow in fresh air), or

3. normal operation (i.e., the flaps move, the blower runs, and the AC ECU decides whether to run the AC compressor or water valve).

On that early and late standard/euro TR AC set-up, providing option 2 is the tricky one that requires getting into the electrics at the AC unit itself. However, I think option 1 and 3 could be provided with a simple SPST switch spliced into that GV wire leaving the AC push button unit (i.e., if the SPST switch is closed you get option 3, and if the SPST switch is open you get option 1).

If your system only has a single GV wire leaving the AC push button unit then I'd guess that it's designed like those section H schematics; however, if you have 2 GV wires (leaving from the same terminal) then I'd guess that your '87 is like the later US TR -- but let me know if you ever get the copy from 457/86.

Give me a day or two, and I'll post modified schematics of:

Converting a standard/euro (1 GV wire at the AC pushbuttion unit terminal) to having option 1 or 3 (using a SPST switch on-off)
Converting a late US TR (2 GV wires at...) to having option 1 or 3 (using a SPST switch on-off)
Converting a late US TR (2 GV wire at...) to having option 1, 2, or 3 (using a DPDT switch on-off-on)

 

This thread prompted me to take a look again at the owner's handbook for my '87 (single lug) model. Bear in mind that each page of the handbook is in three languages, Italian, French and English. Sometimes I think the English is a vague translation from the French, which in turn is translated from the Italian.

Button 14, the first of the three buttons following a gap for the 'off' button, is claimed to be for "summer air conditioning, the external inlet for ventilation air is closed, the inlets for internal re-circulation are open." Which is why I do not use it, as things soon mist up and this despite the addendum "Should be pressed only in summer for maximum efficiency of the air conditioner."

The next button, no.15, is the one I use in all seasons and it works perfectly well: "ventilation, air conditioning in intermediate seasons heating, the inlet for external ventilation air is open. Should always be pressed in normal conditions. This allows cold or warm ventilation with external air". The Italian and French instructions are clearer about this button's role in working in summer, for 'intermediate seasons' and for winter heating.

For the purposes of this thread, the relevant point to note is that button 15 brings air in from outside, i.e. fresh air, whether or not the air is directed to the footwell (yes, yellow bars=footwell) or to the fascia vents.

Button 16 is a defroster.

 

Yeah... The TR certainly does provoke responses ranging from, Oh, my God! to somewhat amusing pretense of not noticing her at all!

I call it Creating a scene. - And it does. Neck breaking, open mouthed scenes.

Of course, there aren't too many Ferraris around here. 8)

 

Heck, I get that from standing up too fast..................

 

I can still jump around a little too.

 

Steve's, according to 457/86 that car has a 1mm GV wire from AC control going to the fan speed control in console as well as a 1.5mm going to (and it branches out to 2 wires) the fan speed power transistor and the relay for the electro magnetic valve term 86 and daisy chains over to term 86 for the AC compressor relay.