If you have a failing ASCD (a.k.a Cruise Control), check FOUR fuses.
This is based on my 1992 EURO SPEC TT
Battery -> Horn Relay (Location : Engine Bay, 10A). If this one is blown, the MAIN cruise control (i.e. on the left pod) will work, but it will NOT be able to set the speed. Seems it cuts continuty from the Set/Reset/accel THROUGH the Horn relay.
Ingition Switch -> ASCD (a.k.a. Cruise Control) Hold Relay (Location : ?). This one makes sense.
Battery -> Stop Lamp Switch (Location : ?). Depressing the brake kills the ASCD, makes sense.
Ingition Switch -> Electronic Speedometer (Location : ?).
And....looking at the complete diagrams, it seems that these fuses are controlling a LOT more than what's labelled on the box (someone told me on an auto the ASCD fuse controls sometimes the BACKUP lights ???)
H. Le Hir
The ASCD unit under the hood (in front of the battery) requires vacuum to operate. Make sure the hose leading to the actuator has vacuum.
Buzz
