S13 Silvia Digital Climate Control Conversion Instructions - Analogue to Digital Conversion using the Analogue Loom.
Interpreting Colours and Pin Numbering:
The pin numbers apply to the plugs as they face you, i.e. The connecting side of the plug is facing you and the wires are on the furtherst side.
Here is how the pins are numbered:
~INSERT REMAINING PIN NUMBERING DIAGRAM HERE~
B = Black
W = White
R = Red
Gr = Green
Lgr = Light Green
Y = Yellow
Br = Brown
Or = Orange
Bl = Blue
Pnk = Pink
Wire colours take the form - Base Colour/Stripe (i.e. B/W = Black with White Stripe)
For the purposes of this article these plugs within the climate control loom take the following labels:
Big White Connector -
Medium White Connector -
Small White Connector -
Thermistor Connector -
Blue Relay -
How to remove pins from the plugs:
The pins are held into the plugs by a small clip extending down into a groove in the pin. I used a small flat head screwdriver to push the plastic clip out of this groove as demonstrated in Fig. 1.
1. Un-clip the retaining clips on the top and bottom of the plugs.
2. Slide the screwdriver into the plug directly above the pin.
3. With the screwdriver still inserted, pull on the cable until the pin comes free (Note - When removing the pins i found that i sometimes had to insert the screwdriver more than once in order to push the plastic clip up high enough to remove the pin).
4. Label the pins initial location with some masking tape and move it to the side (I labeled mine with a letter followed by the inital pin number, i.e. B1 = Initally pin 1 from the Big black plug; S1 = Initally pin 1 from the Small black plug).
5. Repeat until all pins have been removed from the black plugs.
When removing the pins be patient, as the last thing you want to do is break one of the plugs!
~INSERT FIGURE(s) HERE (REMOVING PINS)~
Re-Pinning the Plugs:
Important: The Pin numbers shown in Green require you to create a cable.
Small Black Connector:
Pin No. = New Wire/Moved Pin Description
1= Gr/Y - From Big Black Pin 11
2= Bl/B - From Big Black Pin 19
3= Bl/Y - From Big Black Pin 09
5= Pnk/B - From Big Black Pin 06
6= Lgr - From Small Black Pin 03
9= Bl/R - From Big Black Pin 10
10= Bl/W - From Big Black Pin 20
13= Br - From Small Black Pin 11
14= Lgr/B - From Big Black Pin 17
15= Pnk/Bl - From Big Black Pin 07
Big Black Connector:
Pin No. = New Wire/Moved Pin Description
1= R - Doesn’t Exist on Analogue Loom, Run to constant +12v
2= Gr/W - From Big Black Pin 15
3= R/W - From Small Black Pin 16
4= B - Doesn’t Exist on Analogue Loom, Join to Black cable on Pin 10
6= Gr/W - Comes from Blue Relay
7= Br/W - From Small Black Pin 14
8= Or/B - From Small Black Pin 06
9= Lgr/R - From Big Black Pin 05
10= B - From Big Black Pin 12
12= Gr/R - From Small Black Pin 09
13= Gr/B - From Small Black Pin 01
14= Gr/Y - From Small Black Pin 02
15= Gr - From Small Black Pin 04
16= Gr/Y - From Small Black Pin 12
17= Or/Bl - From Small Black Pin 05
18= Pnk - From Small Black Pin 13
19= Lgr/R - From Small Black Pin 08
20= Bl/B - From Small Black Pin 07
To Get Aircon Switch to function: Join the Lgr/R cable from Analogue Plug Pin 07 to the Lgr/B cable from Big White Connector Pin 08.
To Get Temperature control to function: Cut the Lgr cable that comes from the Thermistor Plug, and solder/join it to the Gr/Y cable that is now on Pin1 of the Small Black Connector. (DO NOT CUT THE CABLE AT THE THERMISTOR PLUG END! - What we want here is a LGR cable that runs from the thermistor plug to the cable at Pin1!)
Analogue Spare White Plug: After all of the re-pinning is complete this plug may still be attached by some wires. Cut them close to the plug so that you can remove the plug.
When creating wires for Pins 01 and 04 on Big Black Connector: The obsolete white plug that has now been removed from the loom will have a number of wires attached with pins remaining on the ends. Cut these wires from the plug and use them to create your new ground and constant +12v cables.
Any Exposed wires that are left behind should be taped up or shrink wrapped.
Recirculation Switch Issues
Note: ONLY DO THIS IF YOU ARE EXPERIENCING PROBLEMS WITH THE RECIRCULATE FEATURE! Otherwise your recirculate button will work in reverse.
If you plugged the digital climate control unit into the the analogue loom without doing the conversion first, then odds are your recirculation button will not work. This is because like most other things in the digital unit, these functions are controlled via transistors, and it seems that plugging in the digital unit without first converting the loom fries the transistor(s) that manage the recirculation function, leaving you stuck on the fresh air mode.
If you do not like being stuck on fresh air, and would prefer to be stuck on Recirculate you will need to swap Pins 13 and 14 of the Big Black plug.
If you dont want to be stuck on either, and want to be able to switch between modes then you will need to somehow integrate a relay, or replace the fried part.
Thanks to Lovin-That-80 for letting me pull your car apart so that i could work out the wiring, and thanks to mdConstantine for spotting my typos and working out the original pin locations for the wires i lost track of.
Edited by Lucius, 15 October 2011 - 07:47 PM.