Re: cruise control quit

[Brett Dikeman <brett@pdikeman.ne.mediaone.net>]

>> i am not an expert, but my current vehicle (86 5000cs) has a severe vacuum
>> leak resulting from a hole in the breather hose.  my cruise control also 
>> does
>> not function, and i just had the turning signal/wiper switch etc. unit
>> replaced, so i assume (hopefully) the switches are good.  possibly you also
>> have a vacuum leak somewhere and this is preventing the throttle control
>> system from working properly (if it indeed works via vacuum).  this is a
>> possibility.  i plan to replace the dead breather hose, and i hope that this
>> also remedies the cruise control problem as well.
>
> More likely to be leaky hoses in the cruise system - it doesn't run off
> the engine, it makes it's own private little vacuum - or the pedal
> switches are not closing properly.

Here's a common one: if the clutch cylinder gets replaced, the switch must 
be as well; same with brake cylinder.  They can't be re-used; once the 
switch is removed, it's destroyed.  I bet the previous mechanic ignored the 
Bently and reused the switch without telling anyone.  They're not very 
expensive.

Check the fuse for the CC system as well.  If push comes to shove, check if 
there's voltage going to the vacuum pump motor and/or hook up a vacuum 
gauge to the output.  The CC also relies on a signal from a sensor inside 
the speedometer in a wonderful Rube Goldberg fashion.

Greetings from a fellow boston area lister, daniel!

Brett
(Wayland, MA.)
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Brett Dikeman
brett@pdikeman.ne.mediaone.net
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