In my new 88 the cruise did not work and a circuit from the fuel pump relay to the ecu was also  dead, so after installing new ecu............guess what?  Cruise control works again!!!!!

Apparently a signal comes from the ecu to the control unit for the cruise........

Adam P

81 Vanagon Westy (The Brick)
70 Single Cab "Whitey" (finally on the road)
74 Beetle "Ol Yeller"
73 Transporter (STILL at paint shop)

1984 Partsmobile (for sale)
1982 Westy (for sale)
Used Vanagon Parts for sale (mostly aircooled)