[Urq] Re: Diff. lock switch conversion for '83 Ur Q

[Buchholz, Steven]

... let me get this straight ... you power down the diff lock control
modules???  Do you know whether they are guaranteed to remain in one
position with no power applied?  ISTR Justusson reporting that these
controllers get hot too ... and I have a fuzzy recollection that he thought
it was due to the speed signals not changing ... but I'm probably
oversimplifying.  Are you sure you have things wired correctly?  Window
switches are not as simple in operation as a general DPDT switch, on each
pole there is one contact that is closed even when the switch is in the
middle position ... if you were using this connection you might well be
acting as though the momentary contact lock/unlock switch that the module
normally works with is always pushed ... which might then cause it to draw
excess current.  Given what can happen if a diff is locked or unlocked
unexpectedly at the wrong time, I would certainly prefer to have a system
that is always powered up ...

One thing I forgot to mention in my earlier post on this topic ... Tony Lum
had the idea of using the electrically controlled vacuum switch which is
used to control the recirculate door on the urq and other similar cars.
This solution does not offer the push-on, push-off mode as the diff lock
controller from the 100Q/200Q, but should not have any issues with
overheating.  

Steve B.
San Jose, Kaleefohnia (USA)
> 
> I just used the new style switches and soldered the
> new connectors to the wiring harness.  I was doing
> every other connector anyway with the dash swap. I
> used the rear window lock-out button to turn the power
> to the actuators on and off because they were getting
> very hot being powered up all the time.  Works like a
> champ and everything looks factory.