Genuine Oldsmobile Cutlass Cruise Control Module

Oldsmobile Cutlass Cruise Control Module Parts Questions & Answers

• Module Asm,Cruise Control
  25111880
  Q: What is the purpose of the Cruise Control Module and how should it be adjusted and checked for malfunctions on Oldsmobile Cutlass?

  A: This cruising speed control system is optionally available on certain models and allows the driver to maintain a constant highway speed without the necessity of continual adjustment of foot pressure on the accelerator pedal. The system employs a servo unit connected to the intake manifold, a speedometer cable-driven regulator and various switches. An override capability is built in. Any malfunction in the performance of the system should first be checked out by inspecting the Fuse, the security of the leads and terminals, and the vacuum pipes and connections. The following adjustments should then be checked and if necessary altered to conform to those specified. The servo operating rod which connects to the carburetor throttle linkage should be adjusted by turning the link on the rod until there is 0.02 to 0.04 inches of free play at the carburetor. The regulator can be adjusted by turning the orifice tube in or out (never remove it as it cannot be re-installed). If the vehicle cruises below the engagement speed, screw the orifice tube out. If the vehicle cruises above the engagement speed, screw the orifice tube in. Each ¼ tum of the orifice tube will change the cruise speed by about 1 mph. Tighten the locknut after each adjustment. The brake release switch contacts must open when the brake pedal is depressed between 0.38 and 0.64 inch measured at the pedal pad. The vacuum valve plunger must clear the pedal arm when the arm is moved j inch measured at the switch. The column mounted engagement switch is non-adjustable, and is serviced only as part of the complete tum signal lever assembly. Faulty components should be replaced as complete assemblies after disconnecting electrical leads, vacuum hoses and control cables from them as necessary.