Test SP-2B, Code 34, Cruise Control Vacuum Solenoid Control Circuit

Turn ignition switch to OFF position. Disconnect and inspect Single Board Engine Controller (SBEC) connector. If connector is not okay, repair connector as necessary. Perform VERIFICATION TEST SP-VER . If connector is okay, turn ignition switch to ON position.
Put cruise control ON/OFF switch in ON position. Place DRB-II in volt-meter mode. Probe terminal No. 33 (Tan/Red wire) at SBEC connector. If voltage is 10 volts or more, perform TEST SP-2C. If voltage is less than 10 volts, disconnect cruise control servo connector. Inspect connector.
If connector is not okay, repair connector as necessary. Perform VERIFICATION TEST SP-VER . If connector is okay, place DRB-II in ohmmeter mode. Probe Tan/Red wire in servo connector. If resistance is less than 10 ohms, repair short to ground in Tan/Red wire. Perform VERIFICATION TEST SP-VER . If resistance is 10 ohms or more, go to next step.
Using an external ohmmeter, check resistance at Tan/Red wire between terminal No. 33 at SBEC connector and terminal No. 4 at cruise control servo connector. If resistance is less than 10 ohms, replace cruise control servo. Perform VERIFICATION TEST SP-VER . If resistance is 10 ohms or more, repair open Tan/Red wire. Perform VERIFICATION TEST SP-VER .