Re: Diffs not working

["Adam P. Brodeur" <AdamB@net1plus.com>]

I had thought that the bulbs just got connected.  But, when I go to
engage/disengage the diffs, I don't hear the accompanying vacuum sound.  As far
as vacuum lines, none are disconnected from what I can see.

Bob wrote:

> "Adam P. Brodeur" wrote:
>
> > Hi all,
> >
> > PLEASE HELP.  After installing an aftermarket radio in my 84 4ksq, the
> > center and rear diffs do not lock.  I took apart the dash to take a
> > closer inspection and grabbed the Bentley.  I think I may have cracked
> > the valve, but don't see any cracks.  What do you think could be wrong?
> > My father thinks it could be the return valve.  He said that was a
> > common problem on earlier Corvettes.  Any help would be appreciated in
> > getting the diffs working and the dash back together.
> >
>
> Corvettes? huh?
>
> For a stereo install you were working in that area so you can rule out
> anything wrong under the car I would guess.  The first thing to check would
> be the bulb connection. Maybe they are actually working but not being
> indicated. Second would be a vacuum hose that came off the valve assy.  A
> few inches later the rubber hose goes to plastic hoses, a little deeper in
> the dash, it may have come off there. Third would be the valve itself. Good
> luck, it should be an easy fix.
>
> Bob