What is the purpose of this list?

[Cody Forbes]

Tyson Varosyan wrote:
> Anyone that has done work on the tranny likely knows that for whatever
> reason everything (shifting linkages, clutch cylinders and this diff
> switch) are very inaccessible. It is obvious that a vacuum solenoid
> is going to have 2 nipples and that pressure-vacuum on the diaphragm
> inside is what makes the control rod move. (stating that the sky is
> blue and the sun is yellow does not help me guys!) What would be
> helpful is some sort of a drawing showing how things are down there.
> I am going solely by feel with my hand twisted into shapes not
> intended for the human body and with all the garbage in that small
> area it is hard to tell what is what. Having a drawing of what I am
> supposed to be feeling, would help a great deal! I would guess that
> the vacuum lines are color-coded and correspond to the switch inside
> the cabin (which would help troubleshoot etc.) - THIS information is
> useful! My indicator light for the center diff is also not working. I
> found a 2-pin sensor-type-thing and 2 wires that were not long enough
> to stretch to it - I am guessing that this is the sensor. Indecently,
> my reverse lights are not working either. In the process of trying to
> work the wires free, I tore one of them. The harness dives somewhere
> between the car body and tranny and disappears. A diagram of the
> wiring for this system would be helpful in figuring out how I can
> re-run some new wires for this sensor, etc.


I'm sorry you are so dissapointed in your replies, but I for one know of no 
such drawings nor diagrams except electrical diagrams in the Bentley manual.

The vacuum problem can be figured out exceptionaly easily - pull both hoses 
off (on a 5000 they can be reached from above), stowe them where you can 
access the ends without much trouble (maybe use a fitting and some spare 
hose to extend them if needed), start the engine, then flip the diff-lock 
switch on and feel which hose has vacuum. Stick that hose on the 
forward-most nipple and the other hose on the rear-ward nipple. Voila.

Your wiring problem is a bit harder but not much. Acess is mostly limited to 
from the bottom. I can't help with wire colors or details because the 
manuals I cared to invest in are 100+ miles away right now. Your trans wire 
harness is small - one round 4 pin connector at the top of the bellhousing 
that connects it to the car side harness. There are only 4 wires, 2 for 
reverse light, 2 for diff-lock light (speedo is separate). The simple fact 
is that two wires will reach to the diff-lock light switch (rear housing of 
trans facing rear of car IIRC) and two won't. The two that won't reach are 
the reverse light wires, and I *THINK* that switch is about 6 inches from 
the front of the trans on the passenger side (maybe on top), but I can't 
recall for sure. It doesn't matter how you put the wires on each 
sensor/switch as its only completing a circuit.

Here are some photos that may help you with the geography of the top of the 
trans:
http://jcforbes.com/jcfpics/enginepull/P1010004?full=1
http://jcforbes.com/jcfpics/enginepull/P1010001?full=1
http://jcforbes.com/jcfpics/enginepull/P1010001?full=1
http://jcforbes.com/jcfpics/engineinstall/P4290038?full=1 - This may be 
best, you can see diff lock light switch near rear of trans actually facing 
towards passenger side with red wire connectors on it
http://jcforbes.com/jcfpics/3-10-07fubar/P1010013?full=1

Its hard to see in the pictures, but I think the reverse switch may be right 
above the diff-lock solenoid. Actually I'm fairly sure thats where it is.
http://jcforbes.com/jcfpics/3-10-07fubar/P1010012?full=1


-Cody Forbes
http://www.5000tq.com
'87 5ktq - Fast.
'87 5ktq QLCC'd plus some
'86 5ktqCD
'86 5k
'86 5k - Sold last Tuesday :-(