What are the four rectangular boxes shown in this schematic? Relays?
I am most interested in the top and bottom left relays(?). The one with the green/pink/brown and the one with brown/yellow... Brown.... Red/white.
Also where are they on the car (87 xj6 left drive).



Here's the whole schematic

 

Those are switches actuated by turning the mode control dial. They're mounted on back side of the mode control dial. Not easy to access.

"Microswitch and cams assembly" in this illustration



Cheers
DD

 

Thanks again Doug

 

I'll throw in the picture from S57, shows what each box does. Bottom-middle of the pic.

Dave

 

Thanks Dave. I have traced my no power issue back to the brown wire (female side) of the round connector that plugs into the amplifier. I thought maybe it was the master climate control switch per your schematic but the climate control switch operates when I disconnect and apply 12 volts directly to the Ranco thermostat. I am able to activate the blowers at the low/auto/hi/def (a, b, c, d per your schematic). Now I am thinking I have to back trace the brown wire. Yikes. Maybe I can jump 12 volts to the brown wire at the connector and see if it feeds power everywhere per the schematic? Thanks. Ren

 

Dave (or anyone), I went to the junkyard and retrieved this Medusa looking climate control switch. It got me to thinking why there isn't a fifth switch for the auto setting called out in any schematic? Ren

 

I'm sorry Ren, I don't have an answer for that. I see what you mean on the schematic with A-D, but I can't tell you where the "auto" comes in------but I'll bet my next pay check that it does.
Someone much smarter than us will chime in and shed light.

Dave

 

Hi, don't know about being smarter, I bought 4 old Jags after all !

I'll assume you already have the Jag factory ROM - Book 12 ? ( Jose has it free on his site if not ).
If you look at page 82-12 it has the switch position chart on the diagram I clipped below, the 4 switches are used in different combinations to make the 5 modes operate.

Off = A closed, B open, C open, D open
Low = A closed, B closed, C closed, D open
Auto = A closed, B open, C closed, D closed
Hi = A closed, B closed, C closed, D closed
Def = A open, B closed, C closed, D closed

The separate Delanair Mark II service manual goes into a better description / explanation than I can as to the purpose & operation on pages 29-32.

I also clipped the diagram showing the NO ( normally open ), NC ( normally closed ) positions with the wiring connections since it's kinda confusing to have a "open" switch making an electrical connection !







Hope this helps,
Brian

 

Hi, just realized that the diagram for the mode control switch Fig 26 showing the "actual" switch locations on the shaft has C & D backwards ! Don't have a switch to inspect right now to figure out whats correct, so beware and check the wire colors to make sure !

Cheers,
Brian

 

Brian: thanks for the in depth information. i'll admit i am way over my head but will keep taking small bites of this information. as mentioned earlier, i have no function at the climate control switch. i have been following the step by step directions given by allen (novo2001 who i found on youtube as allen makes a version of the amplifier) checking various fuses and applying power as indicated. allen suspected the switch itself as the culprit after i applied 12 volts via jumper to the brown wire pin on the backside of the connected amplifier with the key set on accessory. after doing so i heard the compressor click and i had blowers working at the auto/hi/defrost setting (i could feel the volume of air change as i moved from auto/hi to defrost). i did NOT have any blower at the low setting.

i hope it's the switch as it's a big job to remove it. got to remove the entire console and a bunch of stuff to finally get it out. i wish i could just remove and attach each of the 10 or 12 switch wires to the salvaged switch. what a bugger.

Any advice would be appreciated. I'd recommend finding novo2001 you tube post regarding his amplifier solution. not for everyone but he is very inventive.

ren

novom2001

 

Hi
Some years ago I had problems with the mode switch on my XJ12. I was able to remove the control switch and replace the individual microswitches that are operated by the cams in the mode switch. The microswitches are a very common type, easily available from any electronics shop like Radio Shack. You will need the variant of switch that has the correct operating lever, which I think is a long straight bar, and the correct terminals which I think are for a spade type push on connector.
Can I also recommend reading Kirby Palm's excellent free book, "XJ-S: Experience in a book". It is still available (I think) to download on the Jag-Lovers website. It has a comprehensive section on the aircon, Delanair Mk II, which is shared across XJ-S, XJ6 and XJ12.
Pete M