80q cruise control

[Huw Powell]

> If Huw doesn't chime in, try his website:  http://www.humanspeakers.com/audi/cruise.htm

Well, that saves me looking up the url!

> The cruise control on my 88 80q is no longer functioning, and I want you to 
> do something about it.
> 
> Actually, a little diagnostic advice would be helpful.
> 
> The pneumatic components seem to be working correctly (air bladder, vacuum 
> lines and vacuum switches Haven't checked the pump yet, but wanted to see if 
> it was getting voltage first).
> 
> The brake and clutch electrical switches checked out ok.
> 
> My bentley is not with me, so I don't have that to assist me, and I have not 
> dived into checking the column switch or the controller yet. In fact, I 
> don't even know where the stupid controller is on this car. Any help here?
> 
> I did some very basic diagnostics while driving by hooking up the vacuum 
> pump wiring harness to my multimeter.
> 
> the setup is as follows looking at the wiring harness
> 
> 2
> 1 l l 3
> 
> 
> Wire 1 -- Blue / Green
> Wire 2 -- Red / Brown
> Wire 3 -- Red / Blue
> 
> Hitting the cruise control produced the following:
> 
> Leads 1/2 No voltage recorded.
> 
> Leads 1/3 -- Momentary spike (up to 2+ volts,) then back to 0
> 
> Leads 2/3 -- Momentary spike (up to 2+ volts,) then back to 0
> 
> Any thoughts as to what it might be? Any idea on where the controller is so 
> I can do a complete diagnostic on the system?

Controller is behind ashtray til 87, from 88 on (new body style) it's 
above the glovebox, sort of.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/