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Code 34, Cruise Control Solenoid Circuit

  1. While listening to cruise control servo, using DRB-II, actuate cruise control servo solenoids. If cruise control servo clicked when cycling on/off switch, perform TEST SP-18B. If cruise control servo did not click when cycling on/off switch, go to next step.
  2. Disconnect and inspect cruise control servo connector. If connector condition is not okay, repair connector as necessary. Perform VERIFICATION TEST SP-VER  . If connector condition is okay, place DRB-II in voltmeter mode. Ensure brake pedal is NOT depressed.
  3. Using DRB-II, actuate cruise control servo solenoids. Probe terminal No. 2 (Dark Blue/Red wire) at cruise control servo connector. If voltage is 10 volts or more, perform TEST SP-18C  . If voltage is less than 10 volts, go to next step.
  4. Ensure brake pedal is NOT depressed and backprobe Dark Blue/Red wire at brakelight switch connector. If voltage is less than 10 volts, repair open Dark Blue/Red wire. Perform VERIFICATION TEST SP-VER  . If voltage is 10 volts or more, backprobe Tan wire in brakelight switch connector.
  5. If voltage is 10 volts or more, adjust or replace brakelight switch as necessary. Perform VERIFICATION TEST SP-VER  . If voltage is less than 10 volts, disconnect cruise control relay. Probe terminal No. 1 (Dark Blue/White wire) at cruise control relay connector.
  6. If voltage is less than 10 volts, repair open Dark Blue/White wire. Perform VERIFICATION TEST SP-VER  . If voltage is 10 volts or more, disconnect brakelight switch connector. Inspect connector. If connector condition is not okay, repair connector as necessary. Perform VERIFICATION TEST SP-VER  . If connector condition is okay, go to next step.
  7. Using an external ohmmeter, check resistance at Tan wire between terminal No. 5 at brakelight switch connector and terminal No. 4 at cruise control relay connector. If resistance is 10 ohms or more, repair open Tan wire. Perform VERIFICATION TEST SP-VER  . If resistance is less than 10 ohms, replace cruise control relay. Perform VERIFICATION TEST SP-VER  .
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