4kq diff locks questions

[Adam P. Brodeur]

Hi Greg

When mine stopped working I started at the source...start under the hood checking
vacuum lines particularly the ones coming off of the intake manifold bellow.  This
can easily fall off, (which was were my problem was), and if so, no vacuum = no
diff locks.  Good luck

Adam Brodeur

greg rich wrote:

> Hi all,
> My recent purchase 1986 4000 S quattro -
> The diff locks are not working when the knob is turned to either position. I
> can make the rear diff engage by playing with the valve at the back (the light
> comes on in the dash), but I can't make them work otherwise. What is a good
> start, diagnosis wise (sorry, I dont't have a bentley manual yet). Are the
> actuators known to seize up, or the control in the dash unreliable? The all
> wheel drive is working in normal mode.
> Thanks
> Greg
>
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