[s-cars] electric diff-lock switch?

[dgraber460 at aol.com]

That is what I was considering doing.........using one (or 2) on the URQ. I have always harvested these switches from the breakers whenever I found them, as they were cheap and I thought - "someday I might find a use for these".
I also grabbed a few vacuum storage vessels to "assist" the system. I currently have one in use on the URQ, located in the cowl by the windshield wiper motor, and it sped up the activation process quite a bit.
What wiring on the switch would I use to power it for simple on/off?
I've tried a few different power and ground configurations and can't get it to respond.


Dennis 
Denver



-----Original Message-----
From: Scott Justusson <qshipq at aol.com>
To: dgraber460 <dgraber460 at aol.com>; quattro <quattro at audifans.com>; s-car-list <s-car-list at audifans.com>
Cc: bhowell <bhowell at rmi.net>; hackl911 <hackl911 at comcast.net>; seiche <seiche at cellport.com>; petergg <petergg at quasar.dimensional.com>; dlawson <dlawson at ball.com>
Sent: Thu, Feb 27, 2014 9:35 pm
Subject: Re: [s-cars] electric diff-lock switch?


Dennis
Not clear on what you are trying to do.  If it's just to add an additional on/off switch, you only need to put a momentary contact switch in parrallel with the stock one you already have.  Many years ago, I rigged 2 of these electro-pneumatic switches with computer boxes up to my urq center and rear diffs.  The trigger switch activation is momentary on>momentary off (with blue white speed sensor wire disabled) so you only need to find the stock rear diff switch wires that have momentary continuity, and add as many additional parallel triggers you desire.  The diff computer will light up the triangle, and the diff switch will light up the actual lock indicator once locked.  BTDT

http://forums.audiworld.com/picture.php?albumid=37342&pictureid=46522

HTH

Scott J

 

 

 

-----Original Message-----
From: dgraber460 <dgraber460 at aol.com>
To: quattro <quattro at audifans.com>; s-car-list <s-car-list at audifans.com>
Cc: bhowell <bhowell at rmi.net>; hackl911 <hackl911 at comcast.net>; seiche <seiche at cellport.com>; petergg <petergg at quasar.dimensional.com>; dlawson <dlawson at ball.com>
Sent: Thu, Feb 27, 2014 5:21 pm
Subject: [s-cars] electric diff-lock switch?



Has anyone ever tried to wire the elec vacuum switch from under the rear seat of 
the 200 TQ cars (part # 893-919-173) to be a remote electrical switch for the 
rear diff?
Every attempt I've made at powering it up, doesn't activate it. I have the 
wiring diagram from the 92-97 Bentley, but just can't get my non-sparky logic to 
make it work. Is there too much computer nanny circuitry in it to allow it to be 
used this way?
TIA


Dennis 
Denver