Need your wisdom on cruise control switch issue...

[scarceller]

Originally Posted by Porsche80

My brain has been tested and found to be good. The cruise is not working at all and has never worked from what I can tell everything checks out. In the wiring diagram it shows a connection going to the exterior lights and all exterior lights work correctly. Is it possible a reverse connection on exterior light and it still work casuing cc not to work? If you need more info let me know. Is there any way I can test each peice while it is in the car to verify what might be causing the problem. I have been working on this problem for years with no progress.

Thanks

First thing I'd have checked is do you have pulses at Terminal 'A' at the speedo, if you do not the cruise will never work. You really need a Oscilloscope for this and put the car on blocks so you can spin the rear wheels under power.

[kodioneill]

use the search function and you will find a few threads that show a step by step test for the servo , the stalk switch,clutch switch input from the speed sensor.

[Rusty Heap]

if anyone needs some parts, I have the cruise control stalk, computer brain, and servo canister from my 1982SC for sale for cheap.

PM me if interested if you want to swap out your parts.